Direct observation of spin configuration in an exchange coupled Fe/NiO(100) system by x-ray magnetic circular- and linear- dichroism photoemission electron microscope

Kuniaki Arai, Taichi Okuda, Arata Tanaka, Keiki Fukumoto, Takahide Hasegawa, Tetsuya Nakamura, Tomohiro Matsushita, Takayuki Muro, Akito Kakizaki, Toyohiko Kinoshita

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Three dimensional spin configuration in an exchange coupled Fe/NiO(100) system is investigated using a combination of photoemission electron microscopy and magnetic linear- and circular dichroism spectroscopy in the soft-x-ray range. By comparing the experimental image contrasts with a cluster model calculation including the crystal symmetry, we have successfully determined the spin configuration of the bulk antiferromagnetic NiO substrate. The easy axes of the outermost ferromagnetic Fe film and the ferromagnetic interface corresponding to the three kinds of spin axes of the antiferromagnetic NiO substrate have been assigned. We also observe that the magnetic field amplitude required for magnetization reversal depends on these initial easy axes directions. These findings are strongly related to the mechanism of exchange bias phenomena.

本文言語English
論文番号084306
ジャーナルJournal of Applied Physics
110
8
DOI
出版ステータスPublished - 2011 10月 15
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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