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Title: Spin current generation from sputtered Y₃Fe₅O₁₂ films

Spin current injection from sputtered yttrium iron garnet (YIG) films into an adjacent platinum layer has been investigated by means of the spin pumping and the spin Seebeck effects. Films with a thickness of 83 and 96 nanometers were fabricated by on-axis magnetron rf sputtering at room temperature and subsequent post-annealing. From the frequency dependence of the ferromagnetic resonance linewidth, the damping constant has been estimated to be (7.0 ± 1.0) × 10⁻⁴. Magnitudes of the spin current generated by the spin pumping and the spin Seebeck effect are of the same order as values for YIG films prepared by liquid phase epitaxy. The efficient spin current injection can be ascribed to a good YIG|Pt interface, which is confirmed by the large spin-mixing conductance (2.0 ± 0.2) × 10¹⁸m⁻².
Authors:
; ; ;  [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [3] ;  [3] ;  [3]
  1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  2. WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  3. (Japan)
Publication Date:
OSTI Identifier:
22305829
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNEALING; CURRENTS; FERRITE GARNETS; FERROMAGNETIC RESONANCE; FILMS; FREQUENCY DEPENDENCE; INJECTION; INTERFACES; IRON OXIDES; LAYERS; LIQUID PHASE EPITAXY; MAGNETRONS; PLATINUM; SEEBECK EFFECT; SPIN; SPUTTERING; TEMPERATURE RANGE 0273-0400 K; THICKNESS; YTTRIUM COMPOUNDS