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

doi:10.1063/1.3647776

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

International Center for Synchrotron Radiation Innovation Smart (SRIS)

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Abstract

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.

Original language	English
Article number	084306
Journal	Journal of Applied Physics
Volume	110
Issue number	8
DOIs	https://doi.org/10.1063/1.3647776
Publication status	Published - 2011 Oct 15

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Arai, K., Okuda, T., Tanaka, A., Fukumoto, K., Hasegawa, T., Nakamura, T., Matsushita, T., Muro, T., Kakizaki, A., & Kinoshita, T. (2011). Direct observation of spin configuration in an exchange coupled Fe/NiO(100) system by x-ray magnetic circular- and linear- dichroism photoemission electron microscope. Journal of Applied Physics, 110(8), Article 084306. https://doi.org/10.1063/1.3647776

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

abstract = "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.",

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

note = "Funding Information: The experiments were performed with the approval of JASRI (Proposal Nos. 2007B2007, 2008A1726, 2008A2052). This research was partially supported by a Grant-in Aid for Scientific Research (S, 18101004) from the Japan Society for the Promotion of Science. K.A. and T.K. thank Professor K. Fukamichi and Professor C. Mitsumata for their encouragement and useful discussions. K.A. also thanks Professor H. Matsuyama for his stimulating comments.",

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doi = "10.1063/1.3647776",

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volume = "110",

journal = "Journal of Applied Physics",

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Arai, K, Okuda, T, Tanaka, A, Fukumoto, K, Hasegawa, T, Nakamura, T, Matsushita, T, Muro, T, Kakizaki, A & Kinoshita, T 2011, 'Direct observation of spin configuration in an exchange coupled Fe/NiO(100) system by x-ray magnetic circular- and linear- dichroism photoemission electron microscope', Journal of Applied Physics, vol. 110, no. 8, 084306. https://doi.org/10.1063/1.3647776

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T1 - Direct observation of spin configuration in an exchange coupled Fe/NiO(100) system by x-ray magnetic circular- and linear- dichroism photoemission electron microscope

AU - Arai, Kuniaki

AU - Okuda, Taichi

AU - Tanaka, Arata

AU - Fukumoto, Keiki

AU - Hasegawa, Takahide

AU - Nakamura, Tetsuya

AU - Matsushita, Tomohiro

AU - Muro, Takayuki

AU - Kakizaki, Akito

AU - Kinoshita, Toyohiko

N1 - Funding Information: The experiments were performed with the approval of JASRI (Proposal Nos. 2007B2007, 2008A1726, 2008A2052). This research was partially supported by a Grant-in Aid for Scientific Research (S, 18101004) from the Japan Society for the Promotion of Science. K.A. and T.K. thank Professor K. Fukamichi and Professor C. Mitsumata for their encouragement and useful discussions. K.A. also thanks Professor H. Matsuyama for his stimulating comments.

PY - 2011/10/15

Y1 - 2011/10/15

N2 - 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.

AB - 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.

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

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