Size dependence of Peltier cooling in ferromagnet/Au nanopillars

Subrojati Bosu, Yuya Sakuraba, Takahide Kubota, Isaac Juarez-Acosta, Tomoko Sugiyama, Kesami Saito, Miguel A. Olivares-Robles, Saburo Takahashi, Gerrit E.W. Bauer, Koki Takanashi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We study Peltier cooling in current-perpendicular-to-plane multilayer nanopillars with diameters D varying from 60 to 430 nm and made from Au and various ferromagnets (FMs): Heusler compounds Co2MnSi and Co2FeSi (CFS) and conventional FM metals Fe and Co. We report an enhanced effective Peltier coefficient ΠCPP in resistance-current curves at small D (<120 nm). The maximum ΠCPP value of about 165 mV, found for the CFS/Au interface with D ∼ 60 nm, is 24 times higher than the bulk Peltier coefficient Πbulk (∼7 mV) and corresponds to a high cooling power of 43.6 MW/cm2.

Original languageEnglish
Article number083002
JournalApplied Physics Express
Volume8
Issue number8
DOIs
Publication statusPublished - 2015 Aug 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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