Enhancement of anomalous Nernst effects in metallic multilayers free from proximity-induced magnetism

Ken Ichi Uchida, Takashi Kikkawa, Takeshi Seki, Takafumi Oyake, Junichiro Shiomi, Zhiyong Qiu, Koki Takanashi, Eiji Saitoh

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

The anomalous Nernst effect (ANE) has been investigated in alternately stacked multilayer films comprising paramagnetic and ferromagnetic metals. We found that the ANE is enhanced by increasing the number of the paramagnet/ferromagnet interfaces and keeping the total thickness of the films constant, and that the enhancement appears even in the absence of magnetic proximity effects; similar behavior was observed not only in Pt/Fe multilayers but also in Au/Fe and Cu/Fe multilayers free from proximity ferromagnetism. This universal enhancement of the ANE in metallic multilayers suggests the presence of unconventional interface-induced thermoelectric conversion in the Fe films attached to the paramagnets.

Original languageEnglish
Article number094414
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number9
DOIs
Publication statusPublished - 2015 Sep 10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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