X-ray magnetic circular dicroism at the K absorption edge of iron is exploited to elucidate the local spin structure of Fe in metastable, ferromagnetic fee Fe-Cu alloys. At Fe concentrations as high as 50 at.%, Fe-Cu alloys are particularly suitable for studying the magnetic state of iron in an fee environment, because of the negligible contribution of copper to the alloy magnetic moment. The experimental spectra are consistent with the picture of iron atoms coexisting in two different magnetic moment states and point out at the negative sign associated with the low magnetic moment state. This result brings in more evidence on multiple magnetic states, simultaneously present in 3d alloys with competing ferromagnetic and antiferromagnetic interactions, and offers a common explanation to the Invar effects recently reported for the Fe-Cu system.

Magnetic states of iron in metastable fcc Fe–Cu alloys

ORECCHINI, Andrea;SACCHETTI, Francesco;PETRILLO, Caterina;
2006

Abstract

X-ray magnetic circular dicroism at the K absorption edge of iron is exploited to elucidate the local spin structure of Fe in metastable, ferromagnetic fee Fe-Cu alloys. At Fe concentrations as high as 50 at.%, Fe-Cu alloys are particularly suitable for studying the magnetic state of iron in an fee environment, because of the negligible contribution of copper to the alloy magnetic moment. The experimental spectra are consistent with the picture of iron atoms coexisting in two different magnetic moment states and point out at the negative sign associated with the low magnetic moment state. This result brings in more evidence on multiple magnetic states, simultaneously present in 3d alloys with competing ferromagnetic and antiferromagnetic interactions, and offers a common explanation to the Invar effects recently reported for the Fe-Cu system.
2006
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/921349
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 13
  • ???jsp.display-item.citation.isi??? 13
social impact