Pressure tuning of the magnetic transition in Gd{sub5}(Si{sub 0.375} Ge{sub 0.625}){sub 4}giant magnetocaloric effect material.
The effect of hydrostatic pressure on the ferromagnetic ordering transition of the monoclinic Gd{sub 5}(Si{sub 0.375}Ge{sub 0.625}){sub 4} giant magnetocaloric effect compound was investigated using x-ray magnetic circular dichroism measurements in a diamond anvil cell. The Curie temperature T{sub C} increases linearly with applied pressure up to {approx}7.2 GPa, at which point a discontinuity in dT{sub c}/dP occurs. This discontinuity, which appears when T{sub C} reaches {approx}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.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 929640
- Report Number(s):
- ANL/XSD/CP-60755
- Conference Information:
- Journal Name: J. Appl. Phys. Journal Issue: Apr. 1, 2008 Journal Volume: 103
- Country of Publication:
- United States
- Language:
- ENGLISH
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