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Title: Spin Hall magnetoresistance at Pt/CoFe{sub 2}O{sub 4} interfaces and texture effects

We report magnetoresistance measurements on thin Pt bars grown on epitaxial (001) and (111) CoFe{sub 2}O{sub 4} (CFO) ferrimagnetic insulating films. The results can be described in terms of the recently discovered spin Hall magnetoresistance (SMR). The magnitude of the SMR depends on the interface preparation conditions, being optimal when the Pt/CFO samples are prepared in situ, in a single process. The spin-mixing interface conductance, the key parameter governing SMR and other relevant spin-dependent phenomena, such as spin pumping or spin Seebeck effect, is found to be different depending on the crystallographic orientation of CFO, highlighting the role of the composition and density of magnetic ions at the interface on spin mixing.
Authors:
; ;  [1] ;  [1] ;  [2] ;  [2] ; ;  [3] ; ;  [1] ;  [4]
  1. CIC nanoGUNE, 20018 Donostia-San Sebastian, Basque Country (Spain)
  2. (Argentina)
  3. Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Catalonia (Spain)
  4. (Spain)
Publication Date:
OSTI Identifier:
22350856
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 14; 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 COMPOUNDS; COBALT OXIDES; CRYSTALLOGRAPHY; DENSITY; EPITAXY; FERRIMAGNETIC MATERIALS; FERRITES; FILMS; INTERFACES; MAGNETORESISTANCE; MIXING; ORIENTATION; PLATINUM; SEEBECK EFFECT; SPIN; TEXTURE