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Title: Annealing effects on the ferromagnetic resonance linewidths of sputter-deposited Fe{sub 100−x}Co{sub x}(001) thin films (x < 11)

Effects of post-growth annealing on the magnetic damping of 3d transition alloy thin films were investigated. Fe{sub 100−x}Co{sub x} (x < 11 at. %) thin films were epitaxially deposited on GaAs(001) substrates by rf magnetron sputtering, and some of them were annealed without exposing to atmosphere. Electrical measurement showed that in-plane resistivity was smaller in the annealed films than in the as-deposited ones, indicating that the annealing mitigates crystalline imperfections and leads to reduced electron scattering rates. Magnetic damping was evaluated by the peak widths of ferromagnetic resonance (FMR) spectra obtained by a conventional Q-band spectrometer. Comparison of as-deposited and annealed specimens showed that the damping was decreased by annealing. Combined with the electrical and FMR measurements, these observations are consistent with the theoretical predictions that crystalline imperfections strongly influence the magnetic damping, both in intrinsic and extrinsic origins.
Authors:
; ; ;  [1] ;  [2] ; ;  [3]
  1. Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510 (Japan)
  2. Graduate School of Fine Arts, Tokyo National University of Fine Arts and Music, Tokyo 110-8714 (Japan)
  3. Faculty of Science and Engineering, Chuo University, Tokyo 112-8551 (Japan)
Publication Date:
OSTI Identifier:
22409939
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 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; ABSORPTION SPECTRA; ANNEALING; COBALT ALLOYS; COMPARATIVE EVALUATIONS; CRYSTAL STRUCTURE; ELECTRIC CONDUCTIVITY; EPITAXY; FERROMAGNETIC RESONANCE; GALLIUM ARSENIDES; IRON BASE ALLOYS; LINE WIDTHS; SCATTERING; SPUTTERING; SUBSTRATES; THIN FILMS