High-pressure magnetic study of Fe-Ni and Fe-Pt Invar alloys

Magnetic properties of Fe64Ni36 and Fe-Pt Invar alloys under high pressure have been investigated through x-ray magnetic circular dichroism XMCD up to 12 GPa at ambient temperature and superconducting quantum interference device magnetometer up to 1 GPa for different isotherms, from 10 to 300 K. Res...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2009-10, Vol.80 (13), Article 134404
Main Authors: Nataf, L., Decremps, F., Chervin, J. C., Mathon, O., Pascarelli, S., Kamarád, J., Baudelet, F., Congeduti, A., Itié, J. P.
Format: Article
Language:English
Subjects:
Condensed Matter
Other
Physics
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Summary:Magnetic properties of Fe64Ni36 and Fe-Pt Invar alloys under high pressure have been investigated through x-ray magnetic circular dichroism XMCD up to 12 GPa at ambient temperature and superconducting quantum interference device magnetometer up to 1 GPa for different isotherms, from 10 to 300 K. Results obtained with both techniques on Fe-Pt samples can be well interpreted through the 2-state interpretation of the Invar effect. For the Fe64Ni36 alloy, the relative evolution of the iron magnetic moment at 300 K, measured through XMCD, shows the existence of a plateau between 4 and 10 GPa, also expected within this approach. In the low-pressure range, the evolution of magnetization indicates that the itinerant character of Fe-Ni alloys may affect the transition.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.80.134404