| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Structural and Magnetic Properties of Co2MnSi Thin Film with a Low Damping Constant |
| QIAO Shi-Zhu1, ZHANG Jie1, QIN Yu-Feng2, HAO Run-Run1, ZHONG Hai1, ZHU Da-Peng1, KANG Yun1, KANG Shi-Shou1**, YU Shu-Yun1, HAN Guang-Bing1, YAN Shi-Shen1, MEI Liang-Mo1 |
1School of Physics and State Key Lab of Crystal Materials, Shandong University, Jinan 250100
2Department of Applied Physics, School of Information Science and Engineering, Shandong Agricultural University, Tai'an 271018
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| Cite this article: |
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QIAO Shi-Zhu, ZHANG Jie, QIN Yu-Feng et al 2015 Chin. Phys. Lett. 32 057601 |
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Abstract Co2MnSi thin films are made by magnetron sputtering onto MgO (001) substrates. The crystalline quality is improved by increasing depositing temperature and/or annealing temperature. The sample deposited at 550°C and subsequently annealed at 550°C (sample I) exhibits a pseudo-epitaxial growth with partially ordered L21 phase. Sample I shows a four-fold magnetic anisotropy, in addition to a relatively weak uniaxial anisotropy. The Gilbert damping factor of sample I is smaller than 0.001, much smaller than reported ones. The possible reasons responsible for the small Gilbert damping factor are discussed, including weak spin-orbit coupling, small density of states at Fermi level, and so on.
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Received: 18 December 2014
Published: 01 June 2015
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| PACS: |
76.50.+g
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(Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)
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75.70.Ak
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(Magnetic properties of monolayers and thin films)
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75.40.Gb
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(Dynamic properties?)
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75.40.Cx
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(Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))
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75.30.Gw
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(Magnetic anisotropy)
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