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Magneto-optical investigation of epitaxial nonstoichiometric Co2MnGe thin films
| 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 | | magnetisation | | 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 https://dx.doi.org/10.1063/1.3296350 |
| Type: | article |
| URI: | http://hdl.handle.net/2115/42761 |
| 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)
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Submitter: 山本 眞史
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