Spin Dynamics of B2 and L21−Ordered Co2FeAl0.5Si0.5 Heusler Alloy Films
YI Ming1, CHEN Zhi-Feng2, CHEN Da-Xin2, Sukegawa Hiroaki3, Inomata Koichiro3, LAI Tian-Shu2, ZHOU Shi-Ming1,4**
1Surface Physics Laboratory (National Key Laboratory) and Department of Physics, Fudan University, Shanghai 200433 2 State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275 3Spintronics Group, Magnetic Material Center, National Institute for Materials Science (NIMS), Sengen, Tsukuba, Ibaraki, Japan 4Department of Physics, Tongji University, Shanghai 210093
Spin Dynamics of B2 and L21−Ordered Co2FeAl0.5Si0.5 Heusler Alloy Films
YI Ming1, CHEN Zhi-Feng2, CHEN Da-Xin2, Sukegawa Hiroaki3, Inomata Koichiro3, LAI Tian-Shu2, ZHOU Shi-Ming1,4**
1Surface Physics Laboratory (National Key Laboratory) and Department of Physics, Fudan University, Shanghai 200433 2 State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275 3Spintronics Group, Magnetic Material Center, National Institute for Materials Science (NIMS), Sengen, Tsukuba, Ibaraki, Japan 4Department of Physics, Tongji University, Shanghai 210093
摘要Measurements of magnetization precession are performed for L21 and B2−ordered Co2FeAl0.5Si0.5 full Heusler alloy films using the time−resolved magneto-optical Kerr effect technique in the out-of-plan configuration. Dependence of the precession frequency on the external magnetic field can be fitted by the Landau–Lifshitz–Gilbert equation. The chirp parameters are close to each other for the L21 and B2 structures, and decrease with the external magnetic field increasing. The relaxation rate of the B2−ordered film is smaller than that of the L21 one.
Abstract：Measurements of magnetization precession are performed for L21 and B2−ordered Co2FeAl0.5Si0.5 full Heusler alloy films using the time−resolved magneto-optical Kerr effect technique in the out-of-plan configuration. Dependence of the precession frequency on the external magnetic field can be fitted by the Landau–Lifshitz–Gilbert equation. The chirp parameters are close to each other for the L21 and B2 structures, and decrease with the external magnetic field increasing. The relaxation rate of the B2−ordered film is smaller than that of the L21 one.
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