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Search results for: Keyword: materials research

  • <p>The illustration is alluding to the laser experiment in the background and shows the structure of TGCN.</p>SCIENCE HIGHLIGHT      05.06.2019

    Organic electronics: a new semiconductor in the carbon-nitride family

    Teams from Humboldt-Universität and the Helmholtz-Zentrum Berlin have explored a new material in the carbon-nitride family. Triazine-based graphitic carbon nitride (TGCN) is a semiconductor that should be highly suitable for applications in optoelectronics. Its structure is two-dimensional and reminiscent of graphene. Unlike graphene, however, the conductivity in the direction perpendicular to its 2D planes is 65 times higher than along the planes themselves. [...]

  • NEWS      04.06.2019

    Federal Ministry of Education and Research supports the development of a miniaturised EPR spectrometer

    Several research institutions are developing a miniaturized electron paramagnetic resonance (EPR) device with industrial partner Bruker to investigate semiconductor materials, solar cells, catalysts and electrodes for fuel cells and batteries. The Federal Ministry of Education and Research (BMBF) is funding the "EPR-on-a-Chip" or EPRoC project with 6.7 million euros. On June 3, 2019, the kick-off meeting took place at the Helmholtz-Zentrum Berlin. [...]

  • <p>Experiments at the femtoslicing facility of BESSY II revealed the ultrafast angular momentum flow from Gd and Fe spins to the lattice via orbital moment during demagnetization of GdFe alloy.</p>SCIENCE HIGHLIGHT      10.05.2019

    Laser-driven Spin Dynamics in Ferrimagnets: How does the Angular Momentum flow?

    When exposed to intense laser pulses, the magnetization of a material can be manipulated very fast. Fundamentally, magnetization is connected to the angular momentum of the electrons in the material. A team of researchers led by scientists from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI) has now been able to follow the flow of angular momentum during ultrafast optical demagnetization in a ferrimagnetic iron-gadolinium alloy at the femtoslicing facility of BESSY II. Their results are helpful to understand the fundamental processes and their speed limits. The study is published in Physical Review Letters. [...]

  • <p>Tomography of a lithium electrode in its initial condition.</p>SCIENCE HIGHLIGHT      06.05.2019

    3D tomographic imagery reveals how lithium batteries age

    Lithium batteries lose amp-hour capacity over time. Microstructures can form on the electrodes with each new charge cycle, which further reduces battery capacity. Now an HZB team together with battery researchers from Forschungszentrum Jülich, the University of Munster, and partners in China have documented the degradation process of lithium electrodes in detail for the first time. They achieved this with the aid of a 3D tomography process using synchrotron radiation at BESSY II (HZB) as well at the Helmholtz-Zentrum Geesthacht (HZG). Their results have been published open access in the scientific journal "Materials Today". [...]

  • <p>SnSe is a highly layered orthorhombic structure. SnSe undergoes a phase transition of second order at 500&deg;C with an increase of the crystal symmetry from space group Pnma (left) to Cmcm (right).</p>SCIENCE HIGHLIGHT      24.04.2019

    High-efficiency thermoelectric materials: new insights into tin selenide

    Tin selenide might considerably exceed the efficiency of current record holding thermoelectric materials made of bismuth telluride. However, it was thought its efficiency became enormous only at temperatures above 500 degrees Celsius. Now measurements at the BESSY II and PETRA III synchrotron sources show that tin selenide can also be utilised as a thermoelectric material at room temperature – so long as high pressure is applied. [...]

  • <p>Schematic view of carbon structures with pores.</p>SCIENCE HIGHLIGHT      13.03.2019

    X-ray analysis of carbon nanostructures helps material design

    Nanostructures made of carbon are extremely versatile: they can absorb ions in batteries and supercapacitors, store gases, and desalinate water. How well they cope with the task at hand depends largely on the structural features of the nanopores. A new study from the HZB has now shown that structural changes that occur due to morphology transition with increasing temperature of the synthesis can also be measured directly – using small-angle X-ray scattering. The results have now been published in the journal Carbon. [...]

  • <p>Water molecules are excited with X-ray light (blue). From the emitted light (purple) information on H-bonds can be obtained.</p>SCIENCE HIGHLIGHT      20.02.2019

    Water is more homogeneous than expected

    In order to explain the known anomalies in water, some researchers assume that water consists of a mixture of two phases even under ambient conditions. However, new X-ray spectroscopic analyses at BESSY II, ESRF and Swiss Light Source show that this is not the case. At room temperature and normal pressure, the water molecules form a fluctuating network with an average of 1.74 ± 2.1% donor and acceptor hydrogen bridge bonds per molecule each, allowing tetrahedral coordination between close neighbours. [...]

  • <p>The cones represents the magnetization of the nanoparticles. In the absence of electric field (strain-free state) the size and separation between particles leads to a random orientation of their magnetization, known as superparamagnetism</p>SCIENCE HIGHLIGHT      14.02.2019

    Spintronics by “straintronics”: Superferromagnetism with electric-field induced strain

    Data storage in today’s magnetic media is very energy consuming. Combination of novel materials and the coupling between their properties could reduce the energy needed to control magnetic memories thus contributing to a smaller carbon footprint of the IT sector. Now an international team led by HZB has observed at the HZB lightsource BESSY II a new phenomenon in iron nanograins: whereas normally the magnetic moments of the iron grains are disordered with respect each other at room temperature, this can be changed by applying an electric field: This field induces locally a strain on the system leading to the formation of a so-called superferromagnetic ordered state. [...]

  • <p>Neutrons (red arrows) detect the presence of Lithium ions which have migrated into the silicon anode.</p>SCIENCE HIGHLIGHT      28.01.2019

    Batteries with silicon anodes: Neutron experiments show how formation of surface structures reduces amp-hour capacity

    In theory, silicon anodes could store ten times more lithium ions than graphite anodes, which have been used in commercial lithium batteries for many years. However, the amp-hour capacity of silicon anodes so far has been declining sharply with each additional charge-discharge cycle. Now an HZB team at BER II of the HZB in Berlin and the Institut Laue-Langevin in Grenoble has utilised neutron experiments to establish what happens at the surface of the silicon anode during charging and what processes reduce this capacity. [...]

  • <p>(a) Neutronen-Eigenspannungsmessung an einer Schwei&szlig;probe aus handels&uuml;blichen Stahl, (b) Magnetfeldmessung, (c) Schwei&szlig;nahtquerschliff.</p>SCIENCE HIGHLIGHT      21.12.2018

    Neutronenforschung hilft bei der Entwicklung von zerstörungsfreien Prüfverfahren

    Materialermüdung zeigt sich häufig zuerst daran, dass im Innern des Materials Bereiche mit stark unterschiedlichen Eigenspannungen aneinandergrenzen. An der Neutronenquelle BER II am HZB hat ein Team der Bundesanstalt für Materialforschung und –prüfung (BAM) die Eigenspannungen von Schweißnähten aus ferromagnetischem Stahl analysiert. Die Ergebnisse helfen zerstörungsfreie elektromagnetische Prüfverfahren zu verbessern. [...]

  • <p>The STM image shows blue phosphorus on a gold substrate. The calculated atomic positions of the slightly elevated P atoms are shown in blue, the lower lying ones in white. Groups of six elevated P atoms appear as triangles. </p>
<p><strong> </strong></p>SCIENCE HIGHLIGHT      15.10.2018

    Blue phosphorus - mapped and measured for the first time

    Until recently, the existence of "blue" phosphorus was pure theory: Now an HZB team was able to examine samples of blue phosphorus at BESSY II for the first time and confirm via mapping of their electronic band structure that this is actually this exotic phosphorus modification. Blue phosphorus is an interesting candidate for new optoelectronic devices. The results have been published in Nano Letters. [...]

  • <p>The theory group with Joe Dzubiella. </p>NEWS      08.10.2018

    Collaboration between HZB and the University of Freiburg

    Through a Joint Research Group entitled “Simulation of Energy Materials“ Prof. Joachim Dzubiella of the Albert-Ludwigs-Universität, Freiburg will be able to continue his collaboration with the HZB. The theoretical physicist headed the “Theory and Simulation“ group at the HZB until recently and worked closely together with colleagues conducting experimental research. The new research group will concentrate on electrochemical energy storage and solar fuels. [...]

  • <p>The HySPRINT logo (Helmholtz Innovation Lab) printed on a copper solution symbolizes how the thinnest material layers can be produced simply and cost-effectively. Possible applications are solar cells, organic LEDs or transistors. Photo </p>NEWS      22.08.2018

    Printing solar cells and organic LEDs

    Humboldt-Universität zu Berlin and Helmholtz-Zentrum Berlin form a joint lab and research group “Generative production processes for hybrid components”. [...]

  • <p>Granules of aluminium (grey) become a metallic foam when heated.The tompgraphies document the evolution of pores with time. </p>SCIENCE HIGHLIGHT      08.08.2018

    World record: Fastest 3D tomographic images at BESSY II

    An HZB team has developed an ingenious precision rotary table at the EDDI beamline at BESSY II and combined it with particularly fast optics. This enabled them to document the formation of pores in grains of metal during foaming processes at 25 tomographic images per second - a world record. [...]

  • <p>Fossils like this 250 million year old skull of a lystrosaurus can be examined very carefully by neutron tomography. </p>SCIENCE HIGHLIGHT      05.06.2018

    Neutron tomography: Insights into the interior of teeth, root balls, batteries, and fuel cells

    A team of researchers at Helmholtz-Zentrum Berlin (HZB) and European Spallation Source (ESS) has now published a comprehensive overview of neutron-based imaging processes in the renowned journal Materials Today (impact factor 21.6). The authors report on the latest developments in neutron tomography, illustrating the possible applications using examples of this non-destructive method. Neutron tomography has facilitated breakthroughs in so diverse areas such as art history, battery research, dentistry, energy materials, industrial research, magnetism, palaeobiology and plant physiology. [...]

  • NEWS      12.02.2018

    Joint graduate school for data science sponsors its first projects

    The Helmholtz Association, the Einstein Center Digital Future (ECDF) and the universities of Berlin are creating a new PhD programme in Berlin for the field of data science. Helmholtz-Zentrum Berlin is involved in several of the projects. The first training positions are already advertised.  [...]

  • <p>This optical zone melting furnace is producing large single crystals. </p>NEWS      19.06.2017

    New at Campus Wannsee: CoreLab Quantum Materials

    Helmholtz-Zentrum Berlin has expanded its series of CoreLabs for energy materials research. In addition to the five established CoreLabs, it has now set up a CoreLab for Quantum Materials. A research team from the HZB Institute for Quantum Phenomena in New Materials is responsible for the CoreLab and its modern equipment. The CoreLab is also open to experimenters from other research institutes.  [...]

  • <p>The YIW2017's dynamic discussions crowd.</p>NEWS      04.05.2017

    The Young Investigators Workshop 2017 on Dynamic Pathways in Multidimensional Landscapes

    24 scientists from various countries participated in the Young Investigators Workshop 2017 on Dynamic Pathways in Multidimensional Landscapes in Grainau am Eibsee in the Bavarian Alps. This workshop which was organized by Professor Alexander Föhlisch was dedicated to study the research topics of the Helmholtz Virtual Institute 419. It included both experimental and theoretical projects on molecular and chemical dynamics, phase transitions and switching as well as fundamental light-matter interaction. [...]

  • <p>The experimental data show, how a light pulse dissociates a hydrogen nucleus from the nitrogen atom without destroying important bonds within the molecule. </p>SCIENCE HIGHLIGHT      07.04.2017

    Proton transfer: Researcher find mecanism to protect biomolecules against light induced damage

    A team at the Helmholtz-Zentrum Berlin (HZB) together with researchers in Sweden and the USA has analysed a mecanism which protects biomolecules such as the DNA against damage by light. They observed how the energy of incoming photons can be absorbed by the molecule without destroying important bonds. The experiments took place at the Linac Coherent Light Source (LCLS) free-electron laser in California as well as the BESSY II synchrotron source at the HZB in Berlin, where with resonant inelastic X-ray-diffraction a very sensitive method is available. [...]

  • <p>With the upgrade BESSY VSR, Helmholtz-Zentrum Berlin will continue in future to offer a highly demanded synchrotron source for energy materials research with international appeal. Photo: &copy;: euroluftbild.de / Robert Grahn</p>NEWS      01.02.2017

    Green light for upgrading BESSY II into a variable-pulse-length storage ring (BESSY-VSR)

    The General Assembly of the Helmholtz Association has unanimously endorsed the realisation of a unique accelerator project at the BESSY II synchrotron radiation source [...]

  • NEWS      24.01.2017

    Young Investigators Workshop of the Helmholtz Virtual Institute "Dynamic Pathways in Multidimensional Landscapes"

    The Virtual Institute explores the governing principles of material’s function in an internationally highly visible centre of excellence. From now on, young scientists (PhD students, master students, and young postdocs) are invited to participate in the Young Investigators Workshop that will take place from 23rd to 28th April 2017 at the Eibsee-Hotel in the Bavarian Alps. It focuses on the research topics of the Helmholtz Virtual Institute 419 and includes both experimental and theoretical projects on molecular and chemical dynamics, phase transitions and switching as well as fundamental light-matter interaction. [...]

  • <p>Dr. Matthew Mayer</p>NEWS      22.12.2016

    Helmholtz-Zentrum Berlin is establishing a Helmholtz Young Investigator Group for electrochemical conversion of carbon dioxide

    Dr. Matthew T. Mayer from the École Polytechnique Fédérale de Lausanne (EPFL), Switzerland, will be putting together a Helmholtz Young Investigator Group in the field of energy materials research at HZB. He will be researching into how carbon dioxide and water can be converted electrochemically into hydrocarbons such as methane and methanol using renewable energies. Matthew Mayer will receive 300,000 euros per year over a period of five years for establishing and running his Young Investigator Group. [...]

  • <p>More than 100 experts did gather at the international conference "Dynamic Pathways in Multidimensional Landscapes", which was held in September in Berlin.</p>NEWS      19.09.2016

    VI-Conference "Dynamic Pathways in Multidimensional Landscapes 2016"

    Near the museum island, in the heart of Berlin, the International Conference "Dynamic Pathways in Multidimensional Landscapes 2016" has taken place last week. More than 100 international experts met at the Magnus-Haus of the German Physical Society from 12 -16 September 2016. [...]

  • <p>Participants of QENS 2016 and WINS 2016</p>NEWS      12.09.2016

    International conference QENS 2016 and Workshop WINS 2016 in Potsdam

    From 5th to 9th of September HZB has hosted two international scientific events dedicated to the study of the dynamics at nanoscale, QENS and WINS 2016. While Quasielastic Neutron scattering conference (QENS 2016) was dedicated to the scientific applications, international Workshop on Inelastic spectrometers WINS 2016 allowed to touch on the instrumental aspects. 108 scientists from all over the world participated in these events organized in the heart of the Potsdam. [...]

  • <p>A section from the crystal lattice of Calcium-chromium oxide showing how the spins are subject to conflicting demands. In this ball-and-stick model, the green and red sticks connecting the atoms (grey and black balls) represent ferromagnetic interactions while the blue sticks represent anti-ferromagnetic interactions. </p>SCIENCE HIGHLIGHT      25.07.2016

    Novel state of matter: Observation of a quantum spin liquid

    A novel and rare state of matter known as a quantum spin liquid has been empirically demonstrated in a monocrystal of the compound calcium-chromium oxide by team at HZB. What is remarkable about this discovery is that according to conventional understanding, a quantum spin liquid should not be possible in this material. A theoretical explanation for these observations has now also been developed. This work deepens our knowledge of condensed matter and might also be important for future developments in quantum information. The results have just been published in Nature Physics. [...]

  • <p>The nanostructured membrane has a honeycomb pattern with nanoholes of 68 nm in diameter. The nanoholes pin down the magnetic domains.</p>SCIENCE HIGHLIGHT      14.06.2016

    Spintronics: Resetting the future of Heat Assisted Magnetic Recording

    A HZB team has examined thin films of Dysprosium-Cobalt sputtered onto a nanostructured membrane at BESSY II. They showed that new patterns of magnetization could be written in a quick and easy manner after warming the sample to only 80 °Celsius, which is a much lower temperature as compared to conventional Heat Assisted Magnetic Recording systems. This paves the way to fast and energy efficient ultrahigh density data storage. The results are published now in the new journal Physical Review Applied. [...]

  • <p>Combining the results from radiative and non-radiative relaxation processes enabled a complete picture of the filled and unfilled energy levels to be obtained. </p>SCIENCE HIGHLIGHT      11.05.2016

    Ferrous chemistry in aqueous solution unravelled

    An HZB team has combined two different analytical methods at the BESSY II synchrotron source in order to extract more information about the chemistry of transition-metal compounds in solution. These kinds of compounds can act as catalysts to promote desirable reactions in energy materials, but their behaviour has not been completely understood thus far.  The team demonstrated how a detailed picture of the electronic states can be ascertained by systematically comparing all of the interactive electronic processes in a simple system of aqueous iron(II).  The results have now been published in Scientific Reports, the open access journal from Nature Group publishing. [...]

  • <p>Dr. Catherine Dubourdieu is an internationally recognised expert in the field of functional oxides.</p>NEWS      12.04.2016

    Energy Materials: Dr. Catherine Dubourdieu sets up the institute “Functional Oxides for Energy-Efficient Information Technology” at the HZB

    The Helmholtz-Zentrum Berlin (HZB) is boosting its energy materials research and setting up a new institute. Through the Helmholtz Recruitment Initiative, the HZB has gained renowned researcher Catherine Dubourdieu as Institute Director. In the newly established institute “Functional Oxides for Energy-Efficient Information Technology”, she is researching into thin films of metal oxides that make especially promising candidates for information technologies of the future. Dubourdieu formerly worked at the institute “Nanotechnologies de Lyon” of the CNRS and has been at the HZB since 11 April 2016. [...]

  • <p>The team could observe for the first time with RIXS how the formation of hydrogen bonds does change C=O bonds in aceton molecules. </p>SCIENCE HIGHLIGHT      16.03.2016

    Measuring chemistry: local fingerprint of hydrogen bonding captured in experiments

    A team from Helmholtz-Zentrum Berlin has been able for the first time to measure how new bonds influence molecules: they have reconstructed the “energy landscape” of acetone molecules using measurement data from the Swiss Light Source (SLS) of the Paul Scherrer Institut, and thereby empirically established the formation of hydrogen bonds between acetone and chloroform molecules. The results have been published in Nature Scientific Reports and assist in understanding fundamental phenomena of chemistry. [...]

  • <p>Prof. Andreas Jankowiak beim Spatenstich f&uuml;r bERLinPro</p>NACHRICHT      13.11.2015

    rbb-Inforadio: Andreas Jankowiak im Gespräch über bERLinPro

    Die Baustelle für bERLinPro fällt auf. Sie ist auch dem Wissenschaftsredakteur des rbb-Inforadio, Thomas Prinzler, nicht entgangen. Und so kam es zu einem kurzweiligen Gespräch, in dem Andreas Jankowiak die Herausforderungen des Projekts erläutert. Hohe Ströme, hohe Emitanzen - viel Physik. Aber auch die Anforderungen an die Gebäudeplanung kamen zur Sprache. Und die Synergie zu BESSY-VSR. Nachzuhören im Inforadio-Gespräch vom 8. November. [...]

  • <p></p>NACHRICHT      11.09.2015

    Milch, Wirkstoff-Taxis und andere kolloide Materialsysteme analysieren: SAS 2015 tagt in Berlin

    Vom 13. - 18. September treffen sich über 400 Expertinnen und Experten zur 16. Internationalen Konferenz zur Kleinwinkelstreuung (16. International Conference on Small Angle Scattering, SAS 2015) in Berlin. Mit Kleinwinkelstreuung lassen sich biologische und anorganische Materialsysteme auf Nanometerskala untersuchen und dynamische Prozesse beobachten. [...]

  • <p>Prof. Dr. Gerd Schneider becomes a full professur for x-ray microscopy at the Humboldt University Berlin and is the head of the HZB group "Microscopy". </p>NEWS      08.07.2015

    Gerd Schneider receives a professorship for "X-ray microscopy" at Humboldt-Universität zu Berlin

    On 29 April 2015, Gerd Schneider (HZB) accepted the call to a W2-S “X-ray microscopy” professorship at the Department of Physics of Humboldt-Universität zu Berlin. The professorship is associated with heading the workgroup “X-ray microscopy” at the Helmholtz-Zentrum Berlin für Materialien und Energie. With his group, the internationally recognised expert is developing new methods and applications for X-ray microscopy, which delivers crucial information for many scientific disciplines – from material and energy research to the life sciences.  [...]

  • <p><strong>Frostige Wissenschaften:</strong> Experimente mit fl&uuml;ssigem Stickstoff</p>NACHRICHT      11.06.2015

    Eine lange Nacht geballtes Wissen tanken

    Führungen an der Neutronenquelle, Experimente zur Energie für Groß und Klein, Licht-Show und vieles mehr [...]

  • NEWS      01.04.2015

    Antique Osiris figurines from the Egyptian Museum of Florence examined with neutrons

    An research team from the “Nello Carrara” Institute of Applied Physics, Italy, examined three antique bronze figurines non-invasively with neutrons at the Helmholtz-Zentrum Berlin für Materialien und Energie. The statuettes from the Egyptian Museum of Florence embody Osiris, the Egyptian god of the afterlife, the underworld and the dead. Until now, little had been known about what alloy they consist of or how they were produced. Using several analytical methods, the researchers have now shown that the production method and the materials used were astonishingly similar for all three figurines, even though they were crafted in different regions of ancient Egypt.

  • <p>3D-Modelle der Beschleunigerhalle f&uuml;r bERLinPro</p>NACHRICHT      13.03.2015

    Baubeginn für Beschleunigerhalle bERLinPro am Helmholtz-Zentrum Berlin

    Am HZB- Standort Adlershof entsteht ein neuer Linearbeschleuniger mit Energierückgewinnung [...]

  • <p>Dichromium: both chromium atoms "share" the  12 valence electrons which leads to a multible bond. </p>SCIENCE HIGHLIGHT      23.02.2015

    Stretch and relax! – Losing one electron switches magnetism on in dichromium

    An international team of scientists from Berlin, Freiburg and Fukuoka has provided the first direct experimental insight into the secret quantum life of dichromium. Whereas in its normal state the 12 valence electrons form a strong multiple bond between the two chromium atoms, removing only one electron changes the situation dramatically: 10 electrons localize and align their spins, thus resulting in ferromagnetic behavior of the dichromium-kation. The bonding is done by one electron only, resulting in a much weaker bond. The scientists used the unique Nanocluster Trap experimental station at the BESSY II synchrotron radiation source at Helmholtz-Zentrum Berlin and published their results in the Journal Angewandte Chemie. [...]

  • <p>Prof. Dr. J&uuml;rgen Janek, Universit&auml;t Gie&szlig;en</p>NEWS      20.02.2015

    Distinguished Lectures at HZB: Prof. Jürgen Janek will give talk about the Materials Research for "Next Generation" Batteries

    The search for new and the development of improved electrochemical energy storage systems stimulates world-wide research efforts in both academia and industry. While impressive improvements and cost reductions are still to be expected for lithium ionbatteries (LIB) and are part of enormous industrial efforts, more fundamental research aims for the creation and understanding of completely new cell types. [...]

  • <p><br />The High-Field Magnet (HFM) has attained 26 tesla in an initial test and thereby exceeded expectations. The HFM team is pleased about the well-deserved success.<br /><br /></p>NEWS      19.02.2015

    The BER II neutron source is back in operation and available for experiments following the interruption in availability

    Maintenance work has been successfully concluded – the High-Field Magnet has successfully attained 26 tesla in initial testing. New scientific experiments have become possible. [...]

  • <p>180 scientists listened to the lectures. <span>The aim of the dialogue is to identify future scientific fields as well as expectations, needs and requirements</span> for BESSY II.</p>NEWS      05.02.2015

    BESSY II – From Pico to Femto – time resolved studies at BESSY II

    180 scientists attended the workshop on time resolved studies

  • <p>Aus dem Technikum</p>NACHRICHT      18.12.2014

    Hochfeldmagnet sucht Neutronenleiter

    Am Freitag, den 12. Dezember 2014 fand der Umzug des Hochfeldmagneten an seinen endgültigen Aufstellungsort in der Neutronenleiterhalle statt. Eine Spezialfirma für Maschinentransporte bugsierte den über 25 Tonnen schweren Stahlkoloss aus dem HFM-Technikum heraus und setzte ihn in Bewegung. [...]

  • <p>Das HZB beteiligt sich am Aufbau zweier Studieng&auml;nge an derT&uuml;rkisch-Deutschen Universit&auml;t in Istanbul. <a href="http://www.tau.edu.tr" class="Extern">www.tau.edu.tr</a></p>NACHRICHT      28.10.2014

    Deutsch-Türkische Universität am HZB zu Gast

    Vizerektor und Dekan der Naturwissenschaftlichen Fakultät besuchte mehrere Institute des HZB [...]

  • <p>In january 2014, the HFM was just delivered to HZB.  </p>NEWS      22.10.2014

    26 tesla! High field magnet exceeds everyone’s expectations

    It’s done! The high field magnet is consistently producing magnetic fields of approx. 26 tesla and staying at this value over extended periods of time. And all this in spite of the fact that 26 tesla exceeds the original 25-tesla goal; in other words, the magnet turns out to be even stronger than anyone had hoped for. On Thursday afternoon, October 16, 2014, Dr. Peter Smeibidl who heads the HFM’s team of eight was able to report on their success and thank everyone involved with setting up the complex high field magnet with its own cooling systems and 4-megawatt power supply. [...]

  • <p>HZB Freigeist Fellow: Dr. Annika Bande<br />Foto: Mirko Krenzel for VolkswagenStiftung</p>NEWS      17.10.2014

    HZB Freigeist Fellow Dr. Annika Bande

    As of early October, the HZB is home to one of the Volkswagen Foundation's Freigeist Fellows: Dr. Annika Bande recently joined Prof. Dr. Emad Aziz' institute "Methods for Material Development". There she will build up her own junior research group with initially three PhD students. [...]

  • SCIENCE HIGHLIGHT      29.09.2014

    Tage der Forschung in Adlershof

    Am 25. und 26. September fanden in Adlershof die jährlichen Tage der Forschung statt. Das HZB bot rund 90 Schülerinnen und Schülern in drei unterschiedlichen Programmpunkten einen Einblick in die Welt der Forschung. [...]

  • <p>At first, the various parts are carefully unloaded so that they can be lifted quickly into the building through the roof of the NEAT building's newest addition.</p>
<p></p>NEWS      26.09.2014

    NEAT: The chamber from Spain - HZB future log's latest addition

    Since the HZB future log (#HZBzlog) went live in March of this year, there have been a total of 15 episodes on building and developing our future projects. The focus has been on three projects in particular: high field magnet (for a total of seven episodes), EMIL (five episodes), and BESSY-VSR (three episodes). Next, the NEAT project team is taking the #HZBzlog stage. [...]

  • SCIENCE HIGHLIGHT      26.09.2014

    “Multi-spectra glasses” for scanning electron microscopy

    Reflection zone plates produced by HZB enable lighter elements in material samples to be precisely detected using scanning electron microscopy (SEM) by providing high resolution in the range of 50-1120 eV. [...]

  • SCIENCE HIGHLIGHT      26.09.2014

    German Society for Materials Science awards publication with HZB scientist as co-author

    At its annual conference on September 22, 2014, the German Society for Materials Science (DGM), presented the Werner Köster Award for best publication. The work, whose authors include HZB scientist Dr. Michael Tovar and which has been published in the International Journal of Materials Research, examines the catalytic effect of vanadium pentoxide in propene synthesis from propane using spectroscopic, microscopic, and radiographic methods. [...]

  • <p>Im ehemaligen Plenarsaal der Bundesregierung in Bonn finden die Vort&auml;ge statt.</p>NACHRICHT      23.09.2014

    Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen an Großgeräten in Bonn

    Das HZB ist mit eigenem Stand, Vortrag und Postern präsent auf der Deutschen Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen an Großgeräten (SNI). Die dreitägige Veranstaltung findet vom 21. bis 23.09. im ehemaligen Plenarsaal der Bundesregierung im heutigen World Conference Centers in Bonn statt. [...]

  • <p>Outstanding researchers took part in the &ldquo;New Trends in Topological Insulators 2014&rdquo; - workshop.</p>NEWS      01.09.2014

    Leading scientists on topological insulators met in Berlin

    From July 7-10, 150 researchers met in Berlin to discuss recent findings in the field of topological insulators. [...]

  • SCIENCE HIGHLIGHT      22.08.2014

    Proteins: New class of materials discovered

    German-Chinese research team gleans seminal insights into protein crystalline frameworks at HZB's BESSY II [...]

  • <p>Cryogenic TEM micrograph of gold nanoparticles (Au-NP) in DES-solvent. Sputtering duration 300 s. Red circles show the different domains of self-assembled Au-NPs. The inset shows an enlarged image of one particular domain of self-assembled Au-NPs.<br /></p>SCIENCE HIGHLIGHT      04.08.2014

    Self-assembly of gold nanoparticles into small clusters

    Researchers at HZB in co-operation with Humboldt-Universität zu Berlin (HU, Berlin) have made an astonishing observation: they were investigating the formation of gold nanoparticles in a solvent and observed that the nanoparticles had not distributed themselves uniformly, but instead were self-assembled into small clusters. [...]

  • <p>Reconstructed energy-selective neutron tomography: Visualization of austenite and martensite distribution in torsion (two images to left) and tensile (image to the right) loading.<br /></p>SCIENCE HIGHLIGHT      31.07.2014

    Neutron Tomography technique reveals phase fractions of crystalline materials in 3-Dimensions

    Researchers at Helmholtz-Zentrum Berlin (HZB) and The University of Tennessee Knoxville (UTK) developed a novel method, based on energy-selective neutron imaging for visualization of crystalline phase distributions within the bulk of metallic samples. [...]

  • <p>SEM image of the membrane. </p>SCIENCE HIGHLIGHT      01.07.2014

    “Muscled skin”: Simple formulas describe complex behaviors

    HZB researchers help chemists understand polymeric "biomimetic" materials' mechanical properties [...]

  • <p>When inserting an ultrathin dielectric between metal electrode and organic semiconductor, charge carriers (shown here for a positively charged holes in red) are, counter intuitively, more efficiently extracted from their transport level (blue) in the organic to the Fermi level (black) in the metal than without the interlayer.</p>SCIENCE HIGHLIGHT      18.06.2014

    Electrostatics do the trick

    A simple model describes what happens between organic semiconductors and metals [...]

  • <p>These scanning electron micrographs show how accurately the three Fresnel zone plates were positioned above one another. 3D X-ray optics of this kind allow the resolutions and optical intensities to be considerably improved.</p>SCIENCE HIGHLIGHT      18.06.2014

    Sharper imaging using X-rays

    HZB team develops three-dimensional volume diffraction optics for X-rays [...]

  • <p>Modell des Hochfeldmagneten im Ma&szlig;stab 1:5</p>NACHRICHT      29.03.2007

    Der weltweit stärkste Magnet für Neutronenexperimente wird in Berlin errichtet

    Der Kooperationsvertrag zwischen dem Hahn-Meitner-Institut Berlin (HMI) und dem National High Magnetic Field Laboratory (NHMFL) Tallahassee (Florida State University) zum Bau eines neuen Hochfeldmagneten ist unterzeichnet worden. Er wird der weltweit stärkste Magnet für Neutronenstreuexperimente. Von den Experimenten an dem Magneten erwarten Forscher neue Erkenntnisse zu Fragen aus der Physik, Chemie, Biologie und den Materialwissenschaften, unter anderem Beiträge zum Verständnis der Hochtemperatursupraleitung. [...]

  • NACHRICHT      29.07.2004

    Stromsignal hinterlässt in Manganitkristall magnetische Spur

    Optische und kristallographische Experimente belegen erstmals, dass man magnetische Signale durch elektrische Felder erzeugen kann. Für die jetzt veröffentlichten Experimente („Magnetic phase control by an electric field“, Nature, 29. 7. 2004, 430 / 541-544) wurden Manganitkristalle (HoMnO3) mit hexagonaler Atomstruktur untersucht. [...]

  • NACHRICHT      01.05.2003

    Bose-Einstein-Kondensat: Magnetfelder erzeugen ungewöhnlichen Materiezustand

    In einem Experiment am Hahn-Meitner-Institut in Berlin wurden zum ersten Mal die magnetischen Eigenschaften eines Kristalls für die Erzeugung eines Bose-Einstein-Kondensats genutzt. Dieser ungewöhnliche Materiezustand entstand, als der Kristall in ein starkes Magnetfeld von 14 Tesla gebracht wurde und konnte mit Hilfe von Neutronen aus dem Forschungsreaktor des Hahn-Meitner-Instituts nachgewiesen werden. Mit Magnetfeldern von bis zu 17 Tesla (mehr als das 200.000-fache des Erdmagnetfelds) bei Experimenten mit Neutronen stehen in Berlin weltweit einzigartige Forschungsmöglichkeiten zur Verfügung, die Voraussetzung für Erzeugung und Nachweis des Kondensats waren. [...]

  • <p>Erwin M&uuml;ller und sein Feldionenmikroskop, Quelle:"Archiv zur Geschichte der Max-Plank-Gesellschaft, Berlin-Dahlem"</p>NACHRICHT      28.07.2001

    50 Jahre Feldionenmikroskopie

    In seiner Heimatstadt würdigt das 47. Internationale Feld-Emissions-Symposium, das vom Hahn-Meitner-Institut in Berlin-Wannsee organisiert wird, ganz besonders die wegweisenden Arbeiten Erwin W. Müllers - schließlich feiert nicht nur das Feldionenmikroskop seinen 50. Geburtstag, der in Berlin-Treptow geborene Wissenschaftler wäre in diesem Jahr auch 90 Jahre alt geworden. [...]

  • NACHRICHT      19.10.2000

    Nanoröhrchen sollen Bildschirme zum Leuchten bringen

    Der von IBM-Deutschland gestiftete Hahn-Meitner-Technologie-Transfer- Preis zeichnet Materialforscher des Hahn-Meitner-Instituts aus. Fünf Forscher haben unter Leitung von Prof. Dr. Alois Weidinger für ihre innovativen - und vermarktungsfähigen - Entwicklungsarbeiten erhalten. Ihre Forschungsergebnisse könnten die Herstellung neuartiger Flachbildschirme, so genannter Feld-Emissions-Displays (FED), entscheidend verbessern. [...]

  • NACHRICHT      15.06.2000

    EU-Projekt zu exotischen Eigenschaften von Helium-3-Atomen

    Mit einer Förderung von rund einer Million Euro, verteilt über drei Jahre, startet am Hahn-Meitner-Institut ein internationales Grundlagenprojekt, das der weiteren Erforschung der faszinierenden exotischen Eigenschaften des Helium-3 Atoms gilt. Bei den erhofften Ergebnissen geht es sowohl um neue Modelle zur Theorie des Magnetismus als auch um universelle Mechanismen für die treibenden Kräfte sogenannter Phasenübergänge.

  • NACHRICHT      25.02.2000

    Neutronen verraten Wasserstoff in Eiweißen

    Mit immer aufwendigeren Methoden wollen Forscher die feinsten Strukturen auch der lebenden Materie erkunden. So nutzen sie Synchrotronstrahlung und Neutronen, um die atomare Architektur von Proteinen zu enträtseln. Proteine (Eiweiße) sind organische Riesenmoleküle, die aus kompliziert gebauten und phantasievoll gefalteten Ketten Tausender Atome bestehen. Von der Aufklärung ihrer Strukturen auf atomarer Ebene versprechen sich die Wissenschaftler ein tieferes Verständnis der Funktion der an nahezu allen Lebensvorgängen beteiligten Proteine. [...]

  • NACHRICHT      06.01.2000

    Mit neuartigem magnetischen Käfig Lebensdauer von Neutronen genau messen

    Wissenschaftler des Hahn-Meitner-Instituts konnten gemeinsam mit Fachkollegen aus den USA erstmals Neutronen in einer neuartigen dreidimensionalen magnetischen Falle einschließen. Die Apparatur ist der Prototyp eines magnetischen Käfigs, der eine bisher unerreichbar exakte Bestimmung der Zerfallszeit von Neutronen verspricht. Dieses Ergebnis wurde veröffentlicht in Nature, Vol 430, 6 January 2000. [...]

  • NACHRICHT      01.12.1999

    Margarita Russina erhält Promotionspreis mit Arbeit über atomare Diffusionsprozesse bei der Glasbildung

    Den Hahn-Meitner-Promotionspreis erhält am 1. Dezember 1999 die Physikerin Dr. Margarita Russina. Der Preisträgerin war es in besonderer Weise gelungen, die wissenschaftlichen Inhalte ihrer hervorragenden Promotionsarbeit in anschaulicher und für die Öffentlichkeit verständlicher Form darzustellen. [...]