Pressure tuning of the magnetic transition in Gd5 (Si0.375 Ge0.625)4 giant magnetocaloric effect material

Yuan-Chieh Tseng, D. Haskel, J. C. Lang, Ya Mudryk, V. K. Pecharsky, K. A. Gschneidner

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14 Scopus citations

Abstract

The effect of hydrostatic pressure on the ferromagnetic ordering transition of the monoclinic Gd5 (Si0.375 Ge0.625)4 giant magnetocaloric effect compound was investigated using x-ray magnetic circular dichroism measurements in a diamond anvil cell. The Curie temperature TC increases linearly with applied pressure up to ∼7.2 GPa, at which point a discontinuity in d TC dP occurs. This discontinuity, which appears when TC reaches ∼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.

Original languageEnglish
Article number07B301
JournalJournal of Applied Physics
Volume103
Issue number7
DOIs
StatePublished - 21 Apr 2008

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