Elastic Constants and Magnetic Anisotropy of Co/Pt Superlattice: Resonance-Ultrasound-Spectroscopy Method
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概要
- 論文の詳細を見る
The Co/Pt superlattice shows perpendicular magnetic anisotropy, which makes the magnetization direction of the Co layer perpendicular to the film surface when the Co layer is less than about 20 Å thick. One possible cause of perpendicular magnetic anisotropy is large elastic strain at the interfaces between the Co and Pt layers. The elastic strain also changes the macroscopic elastic constants of the Co/Pt superlattice through lattice anharmonicity. In this study, we determined the anisotropic elastic constants of Co/Pt superlattice thin films using resonance ultrasound spectroscopy coupled with the laser/Doppler-interferometry method and studied the relationship between elastic and magnetic properties. We clearly observe a correlation between them, which is interpreted in terms of lattice anharmonicity.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-06-15
著者
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Nishiyama Masayoshi
Central Workshop Osaha University
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Ono Teruo
Institute For Chemical Research Kyoto University
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Ogi Hirotsugu
Graduate School Of Engineering Science Osaka University
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Hirao Masahiko
Graduate School Of Engineering Sci. Osaka Univ.
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Nakamura Nobutomo
Graduate School Of Engineering Science Osaka University
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Ogi Hirotsugu
Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 563-8531, Japan
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Hirao Masahiko
Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 563-8531, Japan
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Ono Teruo
Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
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Nakamura Nobutomo
Graduate School of Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 563-8531, Japan
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