Strong perpendicular exchange bias in sputter-deposited CoPt/CoO multilayers

J. Wang, T. Omi, T. Sannomiya, S. Muraishi, J. Shi, Y. Nakamura

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Strong perpendicular exchange bias was realized in sputter-deposited CoPt/CoO multilayers. The as-deposited multilayer shows strong perpendicular magnetic anisotropy (PMA) which remains up to a critical CoPt layer thickness as thick as 4 nm. After perpendicular field cooling, the multilayer with antiferromagnetic CoO and ferromagnetic CoPt interfaces exhibits large perpendicular exchange bias of 1730 Oe. Strong PMA in the CoPt/CoO multilayer is mainly attributed to the positive magnetoelastic energy due to the remarkable in-plane tensile stress originating from the local epitaxial growth. The mechanism for the exchange bias was explained in terms of the interfacial spin structure.

本文言語English
論文番号042401
ジャーナルApplied Physics Letters
103
4
DOI
出版ステータスPublished - 2013 7 22
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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