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Title: Thickness dependence of spin torque ferromagnetic resonance in Co{sub 75}Fe{sub 25}/Pt bilayer films

The spin Hall angle of Pt in Co{sub 75}Fe{sub 25}/Pt bilayer films was experimentally investigated by means of the spin-torque ferromagnetic resonance and the modulation of damping measurements. By comparing the present results with the Ni{sub 80}Fe{sub 20}/Pt system, we found that the ferromagnetic layer underneath the Pt one greatly affects the estimation of the spin Hall angle. We also discuss the spin diffusion length of Pt and the ferromagnetic thickness dependence of the Gilbert damping coefficient.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [2] ;  [4] ;  [5] ;  [2] ;  [6]
  1. Thematic Unit of Excellence on Nanodevice Technology, Department of Condensed Matter Physics and Material Sciences, S. N. Bose National Centre for Basic Sciences, Block JD, Sec III, Salt Lake, Kolkata 700 098 (India)
  2. RIKEN-CEMS, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
  3. National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047 (Japan)
  4. (NIMS), Tsukuba, Ibaraki 305-0047 (Japan)
  5. Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581 (Japan)
  6. (Japan)
Publication Date:
OSTI Identifier:
22283138
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; 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; COBALT BASE ALLOYS; COMPARATIVE EVALUATIONS; DIFFUSION LENGTH; FERROMAGNETIC RESONANCE; HALL EFFECT; INTERFACES; IRON ALLOYS; LAYERS; MODULATION; PLATINUM; SPIN; THICKNESS; THIN FILMS; TORQUE