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Title: Generation of pure spin currents via spin Seebeck effect in self-biased hexagonal ferrite thin films

Light-induced generation of pure spin currents in a Pt(2.5 nm)/BaFe{sub 12}O{sub 19}(1.2 μm)/sapphire(0.5 mm) structure is reported. The BaFe{sub 12}O{sub 19} film had strong in-plane uniaxial anisotropy and was therefore self-biased. Upon exposure to light, a temperature difference (ΔT) was established across the BaFe{sub 12}O{sub 19} thickness that gave rise to a pure spin current in the Pt via the spin Seebeck effect. Via the inverse spin Hall effect, the spin current produced an electric voltage across one of the Pt lateral dimensions. The voltage varied with time in the same manner as ΔT and flipped its sign when the magnetization in BaFe{sub 12}O{sub 19} was reversed.
Authors:
; ; ; ; ; ; ;  [1] ;  [2]
  1. Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)
  2. Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
Publication Date:
OSTI Identifier:
22395541
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 24; 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; ANISOTROPY; BARIUM COMPOUNDS; ELECTRIC POTENTIAL; FERRITES; HALL EFFECT; INTERFACES; MAGNETIZATION; PLATINUM; SAPPHIRE; SEEBECK EFFECT; SPIN; THICKNESS; THIN FILMS; VISIBLE RADIATION