Negative thermoelectric power induced by positive carriers in CaMn 3-xCuxMn4O12

Wataru Kobayashi; Ichiro Terasaki; Masashi Mikami; Ryoji Funahashi

doi:10.1143/JPSJ.73.523

Negative thermoelectric power induced by positive carriers in CaMn 3-xCuxMn4O12

Wataru Kobayashi, Ichiro Terasaki, Masashi Mikami, Ryoji Funahashi

Research output: Contribution to journal › Article

13 Citations (Scopus)

Abstract

We have found that the thermoelectric power of the ordered perovskite CaMn_3-xCu_xMn₄O₁₂ is negative at high temperature (-35 μV/K at 1000 K), although this material is a hole-doped conductor in which Cu²⁺ is substituted for Mn³⁺. This is quantitatively explained by the extended Heikes formula, where entropy flows in a direction opposite to the charge.

Original language	English
Pages (from-to)	523-525
Number of pages	3
Journal	Journal of the Physical Society of Japan
Volume	73
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.73.523
Publication status	Published - 2004 Mar

Keywords

Heikes formula
Spin and orbital degeneracy
Thermoelectric power
Transition-metal oxide

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.73.523

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Kobayashi, W., Terasaki, I., Mikami, M., & Funahashi, R. (2004). Negative thermoelectric power induced by positive carriers in CaMn 3-xCuxMn4O12 . Journal of the Physical Society of Japan, 73(3), 523-525. https://doi.org/10.1143/JPSJ.73.523

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AB - We have found that the thermoelectric power of the ordered perovskite CaMn3-xCuxMn4O12 is negative at high temperature (-35 μV/K at 1000 K), although this material is a hole-doped conductor in which Cu2+ is substituted for Mn3+. This is quantitatively explained by the extended Heikes formula, where entropy flows in a direction opposite to the charge.

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