Different temperature scaling of strain-induced magneto-crystalline anisotropy and Gilbert damping in Co{sub 2}FeAl film epitaxied on GaAs

Journal Article · Mon Aug 18 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4893949· OSTI ID:22310896

Yuan, H. C.; Zhang, Z.; Zheng, Z.; Chen, L. Y. ^[1]; Nie, S. H.; Ma, T. P.; Chen, Z. H.; Wu, Y. Z. ^[2]

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1. Shanghai Ultra-precision Optical Manufacturing Engineering Research Center, and Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education), Department of Optical Science and Engineering, Fudan University, Shanghai 200433 (China)
2. Department of Physics, State Key Laboratory of Surface Physics and Advanced Materials Laboratory, Fudan University, Shanghai 200433 (China)

The temperature dependence of the Gilbert damping and magnetic anisotropy are investigated in L2{sub 1} Co{sub 2}FeAl films epitaxially grown on GaAs (001) substrate by the time resolved magneto-optical Kerr effect. We found that the in-plane biaxial anisotropy increases by more than 90% with the temperature decreasing from 300 K to 80 K, which is mainly due to the strong variation of the magneto-elastic coefficients. In contrast, the intrinsic Gilbert damping rises only about 10%, which is mainly attributed to the reduction of the electron phonon scattering rate, independent of the strain-induced spin-orbit coupling energy.

• OSTI ID: 22310896
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 105; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM COMPOUNDS
ANISOTROPY
COBALT COMPOUNDS
DAMPING
ELECTRONS
EPITAXY
FILMS
GALLIUM ARSENIDES
IRON COMPOUNDS
KERR EFFECT
L-S COUPLING
PHONONS
REDUCTION
SCALING
SCATTERING
STRAINS
SUBSTRATES
TEMPERATURE DEPENDENCE
TERNARY ALLOY SYSTEMS
TIME RESOLUTION