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Magneto-optical investigation of epitaxial nonstoichiometric Co2MnGe thin films

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タイトル: Magneto-optical investigation of epitaxial nonstoichiometric Co2MnGe thin films
著者: Trudel, Simon 著作を一覧する
Hamrle, Jaroslav 著作を一覧する
Hillebrands, Burkard 著作を一覧する
Taira, Tomoyuki 著作を一覧する
Yamamoto, Masafumi 著作を一覧する
キーワード: Brillouin spectra
cobalt compounds
Kerr magneto-optical effect
magnetic epitaxial layers
magnetisation
manganese compounds
spin waves
発行日: 2010年 2月15日
出版者: American Institute of Physics
誌名: Journal of Applied Physics
巻: 107
号: 4
開始ページ: 043912
出版社 DOI: 10.1063/1.3296350
抄録: We investigate the magneto-optical properties of a nonstoichiometric, epitaxial Co2Mn0.77Ge0.42(001) film grown on a MgO-buffered MgO(001) single-crystal substrate. Magneto-optical Kerr effect magnetometry indicates that the sample has strong uniaxial anisotropy, whereas the easy and hard axes of magnetization are tilted by ∼10° with respect to the [110] and [110] directions, respectively. A modest quadratic Kerr effect with an amplitude of 0.4 mdeg was observed. Brillouin light scattering spectroscopy was used to find that the exchange constant A, spin-wave stiffness D, and saturation magnetization Ms are 22.5 pJ/m, 413 meV Å2, and 6.43 μB/f.u., respectively. The saturation magnetization value suggests that the Slater-Pauling rule might apply to such nonstoichiometric compositions.
Rights: Copyright 2010 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in J. Appl. Phys. 107, 043912 (2010) and may be found at http://link.aip.org/link/?jap/107/043912
Relation (URI): http://link.aip.org/link/?jap/107/043912
資料タイプ: article
URI: http://hdl.handle.net/2115/42761
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 山本 眞史

 

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