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
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.
. [J]. 中国物理快报, 2015, 32(5): 57601-057601.
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. Structural and Magnetic Properties of Co2MnSi Thin Film with a Low Damping Constant. Chin. Phys. Lett., 2015, 32(5): 57601-057601.
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2015, Vol. 32 
