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Title: Heat-driven spin transport in a ferromagnetic metal

As a non-magnetic heavy metal is attached to a ferromagnet, a vertically flowing heat-driven spin current is converted to a transverse electric voltage, which is known as the longitudinal spin Seebeck effect (SSE). If the ferromagnet is a metal, this voltage is also accompanied by voltages from two other sources, i.e., the anomalous Nernst effect in both the ferromagnet and the proximity-induced ferromagnetic boundary layer. By properly identifying and carefully separating those different effects, we find that in this pure spin current circuit the additional spin current drawn by the heavy metal generates another significant voltage by the ferromagnetic metal itself which should be present in all relevant experiments.
Authors:
; ; ; ;  [1] ; ;  [2]
  1. Department of Physics and Astronomy, University of California, Riverside, California 92521 (United States)
  2. Everspin Technologies, Chandler, Arizona 85224 (United States)
Publication Date:
OSTI Identifier:
22395535
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; BOUNDARY LAYERS; ELECTRIC CURRENTS; ELECTRIC POTENTIAL; FERROMAGNETIC MATERIALS; FERROMAGNETISM; HEAT; HEAVY METALS; NERNST EFFECT; PROXIMITY EFFECT; SEEBECK EFFECT; SPIN