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Proceedings Paper

Static and dynamic magnetic property of MBE-grown Co2FeAl films
Author(s): Shuang Qiao; Shuaihua Nie; Yan Huo; Jianhua Zhao; Yizheng Wu; Xinhui Zhang
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Paper 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.

Paper Details

Date Published: 28 August 2014
PDF: 9 pages
Proc. SPIE 9167, Spintronics VII, 91670T (28 August 2014); doi: 10.1117/12.2060638
Show Author Affiliations
Shuang Qiao, Institute of Semiconductors (China)
Shuaihua Nie, Institute of Semiconductors (China)
Yan Huo, Fudan Univ. (China)
Jianhua Zhao, Institute of Semiconductors (China)
Yizheng Wu, Fudan Univ. (China)
Xinhui Zhang, Institute of Semiconductors (China)

Published in SPIE Proceedings Vol. 9167:
Spintronics VII
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi, Editor(s)

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