Linear correlation between uncompensated antiferromagnetic spins and exchange bias in Mn-Ir/Co100-xFex bilayers

Masakiyo Tsunoda, Hirokazu Takahashi, Tetsuya Nakamura, Chiharu Mitsumata, Shinji Isogami, Migaku Takahashi

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A correlation between uncompensated (UC) antiferromagnetic (AF) spins and exchange bias (EB) strength was investigated for Mn74Ir 26/Co100-xFex bilayers. The EB strength had a maximum at x=25 at. %, and the x-ray magnetic circular dichroism of Mn, representing the UC-AF spins, changed systematically in sign and magnitude with respect to x. A linear correlation was found between the EB strength and the root mean square magnitude of the UC-Mn spins. The hidden parameter connecting these two quantities might be exchange coupling energy at the heterointerface, which varies as a function of the ferromagnetic layer composition.

Original languageEnglish
Article number072501
JournalApplied Physics Letters
Volume97
Issue number7
DOIs
Publication statusPublished - 2010 Aug 16

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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