SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 48: Magnetic Instrumentation and Characterization
MA 48.3: Vortrag
Freitag, 31. März 2023, 10:00–10:15, HSZ 401
New versatile instruments for magnetism research at ID12 of the ESRF — •A. Aubert1, K. Skokov1, G. Gomez2, 3, F. Wilhelm3, A. Rogalev3, H. Wende2, O. Gutfleisch1, and K. Ollefs2 — 1Functional Materials, TU Darmstadt (Germany) — 2Fac. of Phys., Uni. Duisburg-Essen (Germany) — 3ESRF, Grenoble (France)
I will introduce two new instruments which have been implemented at the beamline ID12 of the European Synchrotron Radiation Facility (ESRF), in the framework of the ULMAG project funded by BMBF (grant 05K2019). These instruments offer the ESRF users a unique possibility to measure under strictly the same experimental conditions the element-specific X-ray absorption spectroscopy (XAS)/X-ray magnetic circular dichroism (XMCD), XRD simultaneously with the measurement of various macroscopic properties (magnetization, magnetostriction, magnetocaloric, magnetoresistance), as a function of magnetic field (up to 17 T) and temperature (5-325 K) [1].
To demonstrate the potential and features of these scientific instruments, I will present two case studies: (1) FeRh, which has a first-order anti-ferromagnetic to ferromagnetic transition around room temperature (2) HoCo2, which exhibits a first-order ferrimagnetic to paramagnetic transition. These two cases demonstrate new horizons for studying the physics of magnetic materials, where the interplay between the magnetic, structural, and electronic subsystems of the solid is essential.
[1] A. Aubert et al. IEEE Instr. Meas. (2022) 10.1109/TIM.2022.3157001