Scaling Behavior and Magnetic Properties for SmxCo5 Films
来源期刊：JOURNAL OF RARE EARTHS2006年增刊第2期
论文作者：Gai Rongquan Jia Cuihong Li Jiaxin Huang Zhigao Wang Feng Lai Heng Zheng Weifeng
Key words：SmCo films; hysteresis; scaling; rare earths;
Abstract: SmxCo5 (x=1.3, 0.7, 0.4) thin films were prepared by magnetron co-sputtering technique. The samples were annealed at 723 K under Ar atmosphere. The annealed time was chosen as 30 min. The hysteresis loops of the samples were measured under the ac applied magnetic field with the period Tp (2π/ω), H(t)=H0sin(ωt), by vibrating sample magnetometer (VSM). The experimental results indicate that, (1) the average hysteresis loop areas as functions of the values of H0 and ω display a power scaling law with the exponents, A=A0+H0αωβ; (2) the x composition of SmxCo5 film has evident effect on the scaling behavior and magnetic properties; (3) the anisotropy scaling exponents exist clearly in the anisotropy SmxCo5 thin films. Moreover, the scaling behavior of the anisotropy magnetic film was also simulated with Monte Carlo method. The simulated results are consistent with the experimental fact.
Gai Rongquan1，Jia Cuihong1，Li Jiaxin1，Huang Zhigao1，Wang Feng2，Lai Heng1，Zheng Weifeng1
(1.Department of Physics, Fujian Normal University, Fuzhou 350007, China;
2.Department of Physics, Quanzhou Normal College, Quanzhou 362000, China)
Abstract:SmxCo5 (x=1.3, 0.7, 0.4) thin films were prepared by magnetron co-sputtering technique. The samples were annealed at 723 K under Ar atmosphere. The annealed time was chosen as 30 min. The hysteresis loops of the samples were measured under the ac applied magnetic field with the period Tp (2π/ω), H(t)=H0sin(ωt), by vibrating sample magnetometer (VSM). The experimental results indicate that, (1) the average hysteresis loop areas as functions of the values of H0 and ω display a power scaling law with the exponents, A=A0+H0αωβ; (2) the x composition of SmxCo5 film has evident effect on the scaling behavior and magnetic properties; (3) the anisotropy scaling exponents exist clearly in the anisotropy SmxCo5 thin films. Moreover, the scaling behavior of the anisotropy magnetic film was also simulated with Monte Carlo method. The simulated results are consistent with the experimental fact.
Key words:SmCo films; hysteresis; scaling; rare earths;
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