Static and dynamic magnetic property of MBE-grown Co2FeAl films

Shuang Qiao; Shuaihua Nie; Yan Huo; Jianhua Zhao; Yizheng Wu; Xinhui Zhang

doi:10.1117/12.2060638

28 August 2014 Static and dynamic magnetic property of MBE-grown Co₂FeAl films

Shuang Qiao, Shuaihua Nie, Yan Huo, Jianhua Zhao, Yizheng Wu, Xinhui Zhang

Proceedings Volume 9167, Spintronics VII; 91670T (2014) https://doi.org/10.1117/12.2060638
Event: SPIE NanoScience + Engineering, 2014, San Diego, California, United States

Abstract

In this work, the static and dynamic magnetic properties of Co₂FeAl films grown by molecular beam epitaxy (MBE) were studied by employing the magneto-optical Kerr rotation and ferromagnetic resonance (FMR) measurements. The growth temperature dependent magnetocrystalline anisotropy of MBE-grown Co₂FeAl films were first investigated by employing the rotating magneto-optical Kerr effect. Then the magnetization dynamics and Gilbert damping property for high quality Co₂FeAl films were investigated in detail by combining both the FMR and time-resolved magneto-optical Kerr rotation techniques. The apparent damping parameter was found to show strong dependence on the strength of the applied magnetic field at low-field regime, but decrease drastically with increasing magnetic field and eventually become a constant value of 0.004 at high-field regime. The inhomogeneity of magnetocrystalline anisotropy and two-magnon scattering are suggested to be responsible for the observed abnormal damping properties observed especially at low field regime. The intrinsic damping parameter of 0.004 is deduced for our highly-ordered Co₂FeAl film. Our results provide essential information for highly-ordered MBE-grown Co₂FeA film and its possible application in spintronic devices.

Citation Download Citation

Shuang Qiao, Shuaihua Nie, Yan Huo, Jianhua Zhao, Yizheng Wu, and Xinhui Zhang "Static and dynamic magnetic property of MBE-grown Co₂FeAl films", Proc. SPIE 9167, Spintronics VII, 91670T (28 August 2014); https://doi.org/10.1117/12.2060638

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