Structural characterization of Co100-xFex nano-oxide layer

Hiroaki Endo, Masaaki Doi, Naoya Hasegawa, Masashi Sahashi

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For the structural characterization of a Co100-x Fex nano-oxide layer (NOL), the exchange bias properties of the Co100-x Fex -natural oxidized NOL in the specular spin-valve (SPSV) system were investigated. The exchange bias energy (Jex) increased monotonically with the increasing Fe content for the Co100-x Fex -NOL. The enhancement of both the magnetoresistance ratio and the exchange bias field (Hex) was realized by increasing the Fe content in the Co100-x Fex -NOL. It should be mentioned that Hex more than 800 Oe is obtained by the insertion of Co30 Fe70 -NOL, even in NOL-SPSV, which is a remarkably higher pinning field than that ever reported on IrMn-SV. This high exchange bias field is considered to be realized by the formation of an Fe-rich fcc phase at the interface of IrMn.

Original languageEnglish
Article number08R703
JournalJournal of Applied Physics
Issue number8
Publication statusPublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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