Giant Peltier effect in a submicron-sized Cu-Ni/Au junction with nanometer-scale phase separation

Atsushi Sugihara, Masaya Kodzuka, Kay Yakushiji, Hitoshi Kubota, Shinji Yuasa, Atsushi Yamamoto, Koji Ando, Koki Takanashi, Tadakatsu Ohkubo, Kazuhiro Hono, Akio Fukushima

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

We observed a giant Peltier effect in a submicron Cu-Ni/Au junction. The Peltier coefficient was evaluated to be 480 mV at room temperature from the balance between Joule heating and the Peltier cooling effect in the junction, which is 40 times that expected from the Seebeck coefficients of bulk Au and Cu-Ni alloy. This giant cooling effect lowered the inner temperature of the junction by 160 K. Microstructure analysis with a three-dimensional atom probe suggested that the giant Peltier effect possibly originated from nanometer-scale phase separation in the Cu-Ni layer.

Original languageEnglish
Article number065204
JournalApplied Physics Express
Volume3
Issue number6
DOIs
Publication statusPublished - 2010 Jun 1

ASJC Scopus subject areas

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

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