期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 22, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.227205
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG) within the Priority Program Spin Caloric Transport [SPP 1538, KU 3271/1-1, RE 1052/24-2]
- European Synchrotron Radiation Facility (ESRF)
- Alexander von Humboldt Foundation
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.
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