HZB Newsroom
Search results for: Keyword: spintronics
Robust high-performance data storage through magnetic anisotropy
An international team led by Prof. Dr. Matias Bargheer has now observed experimentally for the first time how a special spin-lattice interaction in these iron-platinum thin films cancels out the thermal expansion of the crystal lattice.
Physicists develop "time machine" for materials research
Researchers from Martin Luther University Halle-Wittenberg (MLU), Freie Universität Berlin and Technische Universität München will develop fast electronics for data acquisition at BESSY II. This will enable researchers to evaluate the data more extensively - ...
Laser-driven Spin Dynamics in Ferrimagnets: How does the Angular Momentum flow?
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 ...
New insights into magnetic quantum effects in solids
Using a new computational method, an international collaboration has succeeded for the first time in systematically investigating magnetic quantum effects in the well-known 3D pyrochlore Heisenberg model. The surprising finding: physical quantum phases are ...
Neutrons scan magnetic fields inside samples
With a newly developed neutron tomography technique, an HZB team has been able to map for the first time magnetic field lines inside materials at the BER II research reactor. Tensorial neutron tomography promises new insights into superconductors, battery ...
Future information technologies: nanoscale heat transport under the microscope
A team of researchers from the Helmholtz-Zentrum Berlin (HZB) and the University of Potsdam has investigated heat transport in a model system comprising nanometre-thin metallic and magnetic layers. Similar systems are candidates for future high-efficiency ...
Future information technology: Microscopic insight into processes when magnets...
Magnetic solids can demagnetize upon heating. Despite decades of research, it has so far been unclear how this process works in detail. Now, for the first time, an international group has observed in a step-by-step manner how sudden heating affects the ...
Neutron tomography: Insights into the interior of teeth, root balls, batteries,...
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 ...
Writing and deleting magnets with lasers
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia in Charlottesville, USA have found a way to write and delete magnets in an alloy using a laser beam ...
HZB scientist got the dissertation prize at the spring conference of the...
Dr. Nele Thielemann-Kühn was awarded the dissertation prize of the magnetism research group at the spring conference of the Deutsche Physikalische Gesellschaft (German physical society/DPG) in Berlin. The prize is awarded for outstanding research in the field ...
User research at BER II: New insights into high-temperature superconductors
After 30 years of research, there are still many unsolved puzzles about high-temperature superconductors - among them is the magnetic "stripe order” found in some cuprate superconductors. A Danish research team has taken a closer look at these stripes, ...
HZB researcher Catherine Dubourdieu appointed full professor at Freie...
Catherine Dubourdieu has become a full professor at the Freie Universität Berlin commencing December 2017. The Freie Universität Berlin is one of eleven German elite universities in the German Universities Excellence Initiative. Her position will be that of ...
Future IT: Antiferromagnetic dysprosium reveals magnetic switching with less...
HZB scientists have identified a mechanism with which it may be possible to develop a form of magnetic storage that is faster and more energy-efficient. They compared how different forms of magnetic ordering in the rare-earth metal named dysprosium react to a ...
High Field Magnet at BER II: Insight into a hidden order
A specific uranium compound has puzzled researchers for thirty years. Although the crystal structure is simple, no one understands exactly what is happening once it is cooled below a certain temperature. Apparently, a "hidden order” emerges, whose ...
Optical control of magnetic memory – new insights into fundamental mechanisms
A research team at Helmholtz-Zentrum Berlin (HZB) has shown for the first time how laser modulation of magnetic properties in materials is influenced by thermal effects and how the process occurs under moderate experimental parameters. At the same time, the ...
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 ...
Green IT: New switching process in non-volatile spintronics devices
Physicists achieved a robust and reliable magnetization switching process by domain wall displacement without any applied fields. The effect is observed in tiny asymmetric permalloy rings and may pave the way to extremely efficient new memory devices. The ...
Methods at BESSY II: Versatile cross-correlator for ultrafast X-ray experiments
Particularly in the soft X-ray range experimentalists are lacking a broadband method to correlate ultrashort X-ray and laser pulses in space and time. Only recently, a team from Helmholtz-Zentrum Berlin and the University of Potsdam was able to achieve this ...
Future Information Technologies: New combinations of materials for producing...
An international collaboration at BESSY II has discovered a new method to inscribe exotic magnetic patterns such as magnetic monopoles into thin ferromagnetic films. Such unconventional orientation of magnetic domains might open a new path for the design of ...
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 ...
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, ...
New effect on laser induced switching for higher data densities
An international collaboration has now demonstrated a completely new approach to increase data density in storage media. They used ultra-short laser pulses to trigger a phase transition in the ferromagnetic material BaFeO3 (BFO). Experiments at the Femtospex ...
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 ...
Topological insulators: Magnetism is not causing loss of conductivity
If topological insulators are doped with impurities that possess magnetic properties, they lose their conductivity. Yet contrary to what has been assumed thus far, it is not the magnetism that leads to this. This has been shown by recent experiments with ...
Metal Oxide Sandwiches: New option to manipulate properties of interfaces
A Franco-German cooperation has investigated a sandwich system of transition metal oxides at BESSY II. The scientists discovered a new option to control properties of the interface between the two layers, for instance the amount of charge transferred from one ...
Anomalous magnetic structure and spin dynamics in magnetoelectric LiFePO4
A team at HZB has recently unraveled intricate details of the magnetic structure and dynamics of the magnetoelectric compound LiFePO4.Such materials currently find use in sensors but there are promising perspectives for magnetoelectrics to be applied in data ...
New technique enables magnetic patterns to be mapped in 3D
An international collaboration has succeeded in using synchrotron light to detect and record the complex 3D magnetisation in wound magnetic layers. This technique could be important in the development of devices that are highly sensitive to magnetic fields, ...
New options for spintronic devices: Switching between 1 and 0 with low voltage
Scientists from Paris and Helmholtz-Zentrum Berlin have been able to switch ferromagnetic domains on and off with low voltage in a structure made of two different ferroic materials. The switching works slightly above room temperature. Their results, which are ...
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 ...
“VEKMAG” at BESSY II creates 3D magnetic fields in samples
Together with HZB, teams from the Universität Regensburg, from the Freie Universität Berlin and from the Ruhr Universität Bochum have jointly set up a unique measurement station at BESSY II: a vector electromagnet consisting of three mutually perpendicular ...
Batman lights the way to compact data storage
Researchers at the Paul Scherrer Institute (PSI) have succeeded in switching tiny, magnetic structures using laser light and tracking the change over time. In the process, a nanometre-sized area bizarrely reminiscent of the Batman logo appeared. The research ...
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, ...
Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und...
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 ...
Magnetic switch gets closer to application
Scientists from Paris, Newcastle and Helmholtz-Zentrum Berlin have been able to switch on and off robust ferromagnetism close to room temperature by using low electric fields. Their results are inspiring for future applications in low-power spintronics, for ...
High field magnet for neutron scattering has made its way to Italy
After five years of manufacture, the superconducting spool for the new high field magnet for neutron scattering finally took off from Atlanta, USA, inside the belly of an MD-11F Lufthansa cargo plane on October 9, 2013, at 3:00 am EST. The plane landed in the ...
Prof. Dr. Alan Tennant has accepted a new position
Prof. Dr. Alan Tennant has been selected as the new Chief Scientist for the Neutron Sciences Directorate, at Oak Ridge National Laboratory. He will start in his new capacity there in November 2013. "We are proud to have had Alan Tennant working with us for ...
International Conference in Neutron Scattering: HZB-contributions awarded
More than 800 participants had gathered for the International Conference in Neutron Scattering, held during 8-12 July 2013 in Edinburgh, to discuss advances in neutron research and the advancement of the neutron scattering instruments and techniques. A ...
RUB physicists let magnetic dipoles interact on the nanoscale for the first time
"Of great technical interest for future hard disk drives” Physicists at the Ruhr-Universität Bochum (RUB) have found out how tiny islands of magnetic material align themselves when sorted on a regular lattice - by measurements at BESSY II. Contrary to ...
Ultrafast Spin Manipulation at THz frequencies
The demands for ever increasing speed of information storage and data processing have triggered an intense search for finding the ultimately fast ways to manipulate spins in a magnetic medium. In this context, the use of femtosecond light pulses – the ...
Neue deutsch-russische Forschungsgruppe zu Topologischen Isolatoren
Der HZB-Physiker Dr. Andrei Varykhalov war mit seinem Antrag auf Förderung einer "Helmholtz-Russia Joint Research Group" erfolgreich. Mit diesem Programm fördert die Helmholtz-Gemeinschaft seit 2006 zusammen mit der "Russian Foundation for Basic Research" ...
X-ray laser FLASH uncovers fast demagnetization process
With the help of free-electron laser FLASH at the Helmholtz Research Centre DESY, an international team of researchers has recently described a most surprising effect that can result in faster demagnetization in ferromagnetic materials. This effect could be ...
Prof. Alan Tennant has won the Europhysics Prize, Europe’s foremost prize for...
Tennant was honored for the experimental observation of magnetic monopoles using neutron scattering at the Berlin research reactor BER II. He shares the 2012 prize with 5 other scientists "for the prediction and experimental observation of magnetic monopoles ...
Researchers find spins acting like real bar magnets in a new material
An international team of researchers from Switzerland, Great Britain and Germany has discovered an excellent new material for studying the behaviour of spins. The researchers have shown that the spins in the colourless salt of chemical formula LiErF4 behave ...
Tiny, Tailored Magnets - CeNIDE Researchers Publish in “Nature Communications”
Nanomagnets are used in many places nowadays, from medicine to data storage. Sometimes they have to be strong and and sometimes they have to be weak. Researchers from the Center for Nanointegration (CeNIDE) at University of Duisburg-Essen (UDE) have found out ...
Nutzerexperiment bei BESSY-II: Ein schneller Schalter für Magnetnadeln
Wissenschaftler aus aller Welt kommen ans HZB, um die beiden Großgeräte – die Synchrotronstrahlungsquelle in Adlershof und den Forschungsreaktor in Wannsee – für ihre Untersuchungen zu nutzen. Doch bevor es mit den Messungen losgehen kann, müssen ...
Imaging with neutrons: Magnetic domains shown for the first time in 3D
So far, it has only been possible to image magnetic domains in two dimensions. Now, for the first time, Scientists at Helmholtz-Zentrum Berlin (HZB) have managed to create three-dimensional images of these domains deep within magnetic materials.
Golden ratio discovered in a quantum world
Researchers from the Helmholtz-Zentrum Berlin für Materialien und Energie (HZB), in cooperation with colleagues from Oxford and Bristol Universities, as well as the Rutherford Appleton Laboratory, UK, have for the first time observed a nanoscale symmetry ...
Wie Kreisel auf atomarer Ebene miteinander wechselwirken
Die Wechselwirkungen zwischen Elektronen und dem Atomgerüst in einem Festkörper sind die Grundlage von Materialeigenschaften, die eine zunehmend wichtige technologische Rolle spielen. Dazu gehört zum Beispiel das schnelle Schalten magnetischer Medien, wie es ...
MAXYMUS - Neue Einsichten mit Röntgenblitzen
Das derzeit modernste Rasterröntgenmikroskop wird vom Stuttgarter Max-Planck-Institut für Metallforschung am Helmholtz-Zentrum Berlin eingeweiht; Experten treffen sich zum Workshop über Röntgenmikroskopie Stuttgart/Berlin: Am 10. und 11. November weiht das ...
Magnetic monopoles detected in a real magnet
Researchers from the Helmholtz-Zentrum Berlin für Materialien und Energie (HZB) have, in cooperation with colleagues from Dresden (Germany), St. An-drews (UK), La Plata (Argentina) and Oxford (UK), for the first time observed magnetic monopoles and how they ...
Forscher sehen Molekulare Magneten in neuem Licht
Erkenntnisse über Molekulare Magnete könnten künftig völlig neue Horizonte für eine neue Form der Datenspeicherung sowie der Spintronik (Elektronik mit Spins) auf der Basis einzelner Moleküle eröffnen. Eine Voraussetzung für die Verwirklichung solcher ...
Dreidimensionale Bildgebung- erstmalige Einblicke in Magnetfelder
3D-Bilder werden nicht nur in der Medizin erzeugt, etwa mithilfe der Röntgen- oder Kernspinresonanztomographie. Auch Materialwissenschaftler blicken gern ins Innere eines Körpers. Forschern des Berliner Hahn-Meitner-Instituts (HMI) ist es nun in Kooperation ...
Magnetische Fingerabdrücke im Fotostrom
Wissenschaftlern des Hahn-Meitner-Instituts Berlin (HMI) sowie der Freien Universität (FU) Berlin ist ein außergewöhnlicher Einblick ins Innere von organischen Materialien gelungen. Die Physiker konnten im Fotostrom erstmals eine Quantensignatur magnetisch ...
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 ...
Nanomuster bringen Strom unter Kontrolle: Natriumkobaltoxid als perfektes...
Regelmäßige Muster aus Natriumatomen mit Strukturen im Nanometerbereich machen Natriumkobaltoxid zu einem perfekten Material für Laptop-Batterien, effiziente Kühlmittel oder Supraleiter – das berichten Wissenschaftler des Berliner ...
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) ...
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 ...
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 ...