Magneto-thermopower in the weak ferromagnetic oxide CaRu0.8Sc0.2O3: An experimental test for the Kelvin formula in a magnetic material

Takafumi D. Yamamoto, Hiroki Taniguchi, Yukio Yasui, Satoshi Iguchi, Takahiko Sasaki, Ichiro Terasaki

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2 Citations (Scopus)

Abstract

We have measured the resistivity, the thermopower, and the specific heat of the weak ferromagnetic oxide CaRu0.8Sc0.2O3 in external magnetic fields up to 140 kOe below 80 K. We have observed that the thermopower Q is significantly suppressed by magnetic fields at around the ferromagnetic transition temperature of 30 K, and have further found that the magneto-thermopower QðH; TÞ ¼ QðH; TÞ Qð0; TÞ is roughly proportional to the magneto-entropy SðH; TÞ ¼ SðH; TÞ Sð0; TÞ. We discuss this relationship between the two quantities in terms of the Kelvin formula, and find that the observed ΔQ is quantitatively consistent with the values expected from the Kelvin formula, a possible physical meaning of which is discussed.

Original languageEnglish
Article number104707
Journaljournal of the physical society of japan
Volume86
Issue number10
DOIs
Publication statusPublished - 2017 Oct 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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