Instrument for x-ray magnetic circular dichroism measurements at high pressures
D Haskel1, Y C Tseng, J C Lang
1Magnetic Materials Group, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA. haskel@aps.anl.gov
The Review of Scientific Instruments
|September 4, 2007
Abstract:
An instrument has been developed for x-ray magnetic circular dichroism (XMCD) measurements at high pressures and low temperatures. This instrument couples a nonmagnetic copper-beryllium diamond anvil cell featuring perforated diamonds with a helium flow cryostat and an electromagnet. The applied pressure can be controlled in situ using a gas membrane and calibrated using Cu K-edge x-ray absorption fine structure measurements. The performance of this instrument was tested by measuring the XMCD spectra of the Gd(5)Si(2)Ge(2) giant magnetocaloric material.


