skip to main content

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

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.
Authors:
; ; ; ;  [1] ; ;  [2] ; ; ;  [3]
  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. State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 (China)
  3. Department of Physics, State Key Laboratory of Surface Physics and Advanced Materials Laboratory, Fudan University, Shanghai 200433 (China)
Publication Date:
OSTI Identifier:
22310896
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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