title: Instrument for x-ray magnetic circular dichroism measurements at high pressures.
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.
authors.affiliation: Magnetic Materials Group, Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA. haskel@aps.anl.gov
authors.forename: D
authors.initials: D
authors.lastname: Haskel
authors.forename: Y C
authors.initials: YC
authors.lastname: Tseng
authors.forename: J C
authors.initials: JC
authors.lastname: Lang
authors.forename: S
authors.initials: S
authors.lastname: Sinogeikin
mesh_terms: D002942:Circular Dichroism / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008280:Magnetics / Q000295:instrumentation*; D011312:Pressure; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000295:instrumentation*; D014961:X-Ray Diffraction / Q000295:instrumentation*