Chin. Phys. Lett.  2015, Vol. 32 Issue (5): 057601    DOI: 10.1088/0256-307X/32/5/057601
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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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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.
Received: 18 December 2014      Published: 01 June 2015
PACS:  76.50.+g (Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance)  
  75.70.Ak (Magnetic properties of monolayers and thin films)  
  75.40.Gb (Dynamic properties?)  
  75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))  
  75.30.Gw (Magnetic anisotropy)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/32/5/057601       OR      https://cpl.iphy.ac.cn/Y2015/V32/I5/057601
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QIAO Shi-Zhu
ZHANG Jie
QIN Yu-Feng
HAO Run-Run
ZHONG Hai
ZHU Da-Peng
KANG Yun
KANG Shi-Shou
YU Shu-Yun
HAN Guang-Bing
YAN Shi-Shen
MEI Liang-Mo
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