Magnetic spectroscopy at high pressures using X-ray magnetic circular dichroism

TitleMagnetic spectroscopy at high pressures using X-ray magnetic circular dichroism
Publication TypeJournal Article
Year of Publication2008
AuthorsHaskel D, Tseng YC, Souza-Neto NM, Lang JC, Sinogeikin S, Mudryk Y, Gschneidner KA, Pecharsky VK
Journal TitleHigh Pressure Research
Type of ArticleProceedings Paper
ISBN Number0895-7959
Accession NumberISI:000259629400005
KeywordsABSORPTION, gd-5(sixge1-x)(4), iron, magnetism, origin, POST-PEROVSKITE, radiation, synchrotron, transition, X-ray absorption, X-ray magnetic circular dichroism, XMCD

The imbalance in the electronic density of states between spin-up and spin-down electrons characteristic of ferro(ferri)-magnetic materials gives rise to X-ray magnetic circular dichroism (XMCD) in the absorption of circularly polarized X-rays with opposite helicity. These dichroic effects are largest near element-selective atomic resonances and can be used to probe ferro(ferri)-magnetic ordering with element- and electronic orbital-selectivity. We describe recent developments at the Advanced Photon Source that allow measurements of XMCD in a diamond anvil cell. We discuss the challenges associated with these measurements as well as their potential to further our understanding of complex magnetic materials.

Alternate JournalHigh Pressure Res.