spin-ARPES

spin-ARPES at U125_PGM

The spin-ARPES station can perform accurate measurements of the electronic band structure of solids as well as detect the three components of the spin polarization vector with high energy and momentum resolution. It allows to perform spin- and angle-resolved measurements along any direction in reciprocal space down to a temperature of 40 K.

The spin-ARPES machine is attached to the U125-PGM beamline in the experimental hall at BESSY II.

The spin-ARPES machine is attached to the U125-PGM beamline in the experimental hall at BESSY II.


Methods

ARPES, Spin-resovled PES, UPS, XPS

Remote access

not possible

Beamline data
Energy range 15 - 200 eV (optimal range)
Energy resolution < 1 meV for E < 100 eV
Flux Expected >10^13 (photons/s/0.1%bw/100 mA)
Polarisation Linear horizontal (fixed)
Focus size (hor. x vert.) 68 μm x 25 μm
Phone +49 30 8062 14701
Weitere Details U125_PGM
Station data
Temperature range Measurement: 40–300 K;
Preparation up to 2300 K
Pressure range ~10-9 mbar (for details contact the instrument scientist)
Detector Scienta R4000 with two Mott detectors for spin resolution in 3D
Manipulators Motorized 6 axes manipulator
Sample holder compatibility Omicron sample holders
Additional equipment Preparation chamber with
• heating station,
• sputter gun,
• LEED system,
• magnetic coil for applying external magnetic fields up to 300 Oe along any direction before measurements

The spin-ARPES end station is equipped with a SCIENTA R4000 hemispherical analyzer coupled to two Mott-type spin detectors. It is ideal to perform accurate measurements of the electronic band structure of solids as well as to detect the three components of the spin polarization vector with high energy and momentum resolutions. A motorized six axes manipulator is used to control the sample position with high precision. It allows to perform spin- and angle-resolved measurements along any direction in reciprocal space down to a temperature of 40 K. Temperature-dependent measurements between 300 and 40 K are also possible. The system further features a preparation chamber equipped with two heating stations, a sputter gun, and a LEED system. There are available ports for four different exchangable evaportators. The preparation chamber also contains a magnetic coil capable of applying external pulsed magnetic fields before photoemission measurements of up to 300 mT along any direction. A fast entry load lock is provided for sample exchange. UHV suitcases can be attached directly to the analysis chamber through an already prepared suitable port. For more details please contact the station scientist(s).