Exchange bias controlled by electric current: Interplay of Joule heating and the induced field

Exchange bias is a unidirectional magnetic anisotropy developed in a bilayer of ferromagnetic and antiferromagnetic layers. Its technical importance as a "fix layer is seen in various spintronic devices. The exchange bias can also be a probe to investigate the antiferromagnetic layer as it part...

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Published inJapanese Journal of Applied Physics Vol. 55; no. 7; pp. 70304 - 70307
Main Authors Oda, Kent, Moriyama, Takahiro, Kawaguchi, Masashi, Kamiya, Michinari, Tanaka, Kensho, Kim, Kab-Jin, Ono, Teruo
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.07.2016
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Summary:Exchange bias is a unidirectional magnetic anisotropy developed in a bilayer of ferromagnetic and antiferromagnetic layers. Its technical importance as a "fix layer is seen in various spintronic devices. The exchange bias can also be a probe to investigate the antiferromagnetic layer as it partly reflects the magnetic state of the antiferromagnet. In this work, we investigated the modulation of the exchange bias by a flow of electric current in Pt/Fe50Mn50/FeNi and Cu/Fe50Mn50/FeNi. We show that the exchange bias can be modulated just by applying the current due to interplay among the Joule heating, Ampere field, and current-induced effective field.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.55.070304