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Magneto-optical investigation of epitaxial nonstoichiometric Co2MnGe thin films

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Title: Magneto-optical investigation of epitaxial nonstoichiometric Co2MnGe thin films
Authors: Trudel, Simon Browse this author
Hamrle, Jaroslav Browse this author
Hillebrands, Burkard Browse this author
Taira, Tomoyuki Browse this author
Yamamoto, Masafumi Browse this author →KAKEN DB
Keywords: Brillouin spectra
cobalt compounds
Kerr magneto-optical effect
magnetic epitaxial layers
manganese compounds
spin waves
Issue Date: 15-Feb-2010
Publisher: American Institute of Physics
Journal Title: Journal of Applied Physics
Volume: 107
Issue: 4
Start Page: 043912
Publisher DOI: 10.1063/1.3296350
Abstract: 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
Type: article
Appears in Collections:情報科学院・情報科学研究院 (Graduate School of Information Science and Technology / Faculty of Information Science and Technology) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山本 眞史

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