Uncompensated antiferromagnetic spins at the interface in Mn-Ir based exchange biased bilayers

M. Tsunoda, S. Yoshitaki, Y. Ashizawa, C. Mitsumata, T. Nakamura, H. Osawa, T. Hirono, D. Y. Kim, M. Takahashi

研究成果: Article査読

17 被引用数 (Scopus)

抄録

The microscopic origin of the uncompensated antiferromagnetic (AFM) spins was investigated by means of the x-ray magnetic circular dichroism (XMCD) spectroscopy with transmission mode for Mn-Ir/ferromagnetic (FM) bilayers. As the AFM layer thickness increases, resonant absorption magnitude of Mn L edge naturally increases, but the XMCD magnitude does not change so much. When the FM layer material is modified, the XMCD signal of Mn L edge drastically changes not only in its magnitude but also in its sign. The XMCD signal vanishes without the FM layer. These facts clearly mean that the uncompensated Mn components are induced through the exchange interaction between the FM and the AFM layers and are localized at the very interface. Micromagnetic simulation within the framework of the classical Heisenberg model well supported the above conclusion.

本文言語English
論文番号09E510
ジャーナルJournal of Applied Physics
101
9
DOI
出版ステータスPublished - 2007

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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