Pressure tuning of the magnetic transition in Gd-5(Si0.375Ge0.625)(4) giant magnetocaloric effect material

TitlePressure tuning of the magnetic transition in Gd-5(Si0.375Ge0.625)(4) giant magnetocaloric effect material
Publication TypeJournal Article
Year of Publication2008
AuthorsTseng YC, Haskel D, Lang JC, Mudryk Y, Pecharsky VK, Gschneidner KA
Journal TitleJournal of Applied Physics
Volume103
Pages07B301
Date PublishedApr
Type of ArticleProceedings Paper
ISBN Number0021-8979
Accession NumberISI:000255043200197
KeywordsABSORPTION FINE-STRUCTURE, gd-5(si2ge2)
Abstract

The effect of hydrostatic pressure on the ferromagnetic ordering transition of the monoclinic Gd-5(Si0.375Ge0.625)(4) giant magnetocaloric effect compound was investigated using x-ray magnetic circular dichroism measurements in a diamond anvil cell. The Curie temperature T-C increases linearly with applied pressure up to similar to 7.2 GPa, at which point a discontinuity in dT(C)/dP occurs. This discontinuity, which appears when T-C reaches similar to 277 K, is also observed when the unit cell volume is reduced by Si doping and is associated with the volume-driven monoclinic (M) to orthorhombic [O(I)] structural transition.

DOI10.1063/1.2828514
Alternate JournalJ. Appl. Phys.