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Title: Absence of anomalous Nernst effect in spin Seebeck effect of Pt/YIG

The Pt/YIG structure has been widely used to study spin Seebeck effect (SSE), inverse spin Hall effect, and other pure spin current phenomena. However, the magnetic proximity effect in Pt when in contact with YIG, and the potential anomalous Nernst effect (ANE) may compromise the spin current phenomena in Pt/YIG. By inserting a Cu layer of various thicknesses between Pt and YIG, we have separated the signals from the SSE and that of the ANE. Here, it is demonstrated that the thermal voltage in Pt/YIG mainly comes from spin current due to the longitudinal SSE with negligible contribution from the ANE.
Authors:
 [1] ;  [2] ;  [3] ;  [3]
  1. Nanjing Univ., Nanjing (China); Johns Hopkins Univ., Baltimore, MD (United States)
  2. Johns Hopkins Univ., Baltimore, MD (United States); National Taiwan Univ., Taipei (Taiwan)
  3. Johns Hopkins Univ., Baltimore, MD (United States)
Publication Date:
OSTI Identifier:
1236412
Grant/Contract Number:
SC0009390; E-SC0009390
Type:
Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Research Org:
Johns Hopkins Univ., Baltimore, MD (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; magnetoresistance; gold; thermoelectric effects; polycrystals; electric measurements