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Quantitative Disentanglement of the Spin Seebeck, Proximity-Induced, and Ferromagnetic-Induced Anomalous Nernst Effect in Normal-Metal-Ferromagnet Bilayers

Bougiatioti, P., Klewe, C., Meier, D., Manos, O., Kuschel, O., Wollschlaeger, J., Bouchenoire, L., Brown, S. D., Schmalhorst, J-M., Reiss, G. & Kuschel, T., 29-Nov-2017, In : Physical Review Letters. 119, 22, 6 p., 227205.

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  • Quantitative Disentanglement of the Spin Seebeck, Proximity-Induced

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DOI

  • Panagiota Bougiatioti
  • Christoph Klewe
  • Daniel Meier
  • Orestis Manos
  • Olga Kuschel
  • Joachim Wollschlaeger
  • Laurence Bouchenoire
  • Simon D. Brown
  • Jan-Michael Schmalhorst
  • Guenter Reiss
  • Timo Kuschel

We identify and investigate thermal spin transport phenomena in sputter-deposited Pt/NiFe2Ox (4 >= x >= 0) bilayers. We separate the voltage generated by the spin Seebeck effect from the anomalous Nernst effect (ANE) contributions and even disentangle the ANE in the ferromagnet (FM) from the ANE produced by the Pt that is spin polarized due to its proximity to the FM. Further, we probe the dependence of these effects on the electrical conductivity and the band gap energy of the FM film varying from nearly insulating NiFe2O4 to metallic Ni33Fe67. A proximity-induced ANE could only be identified in the metallic Pt/Ni33Fe67 bilayer in contrast to Pt/NiFe2Ox (x > 0) samples. This is verified by the investigation of static magnetic proximity effects via x-ray resonant magnetic reflectivity.

Original languageEnglish
Article number227205
Number of pages6
JournalPhysical Review Letters
Volume119
Issue number22
Publication statusPublished - 29-Nov-2017

    Keywords

  • NICKEL FERRITE, XMAS BEAMLINE, ESRF

ID: 97043044