Physical properties of the novel layered cobalt oxyphosphide Sr 2ScCoPO3

S. Okada, Yoichi Kamihara, N. Ohkubo, S. Ban, Masanori Matoba, T. Atou

Research output: Contribution to journalArticle

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Abstract

A novel layered cobalt oxyphosphide Sr2ScCoPO3 crystallizes in a layered structure which represents an alternative stack of anti-fluorite type Co2P2 layer and K2NiF 4 type Sr4Sc2O6 layer. This material has a similar structure to that of Sr2ScFePO3 which exhibits superconductivity below 17 K The resistivity of Sr 2ScCoPO3 is 4.5 mΩcm at room temperature and decreases with decreasing temperature. The thermoelectric power of Sr 2ScCoPO3 is -12 μV/K at room temperature and it decreases with decreasing temperature and rapidly increases below 50 K Provided the generalized Hikes formula, the S of Sr2ScCoPO3 is estimated to be -60 μV/K at high temperature region. This relative high value suggests that Sr2ScCoPO3 is a promising high performance thermoelectric material.

Original languageEnglish
Article number022091
JournalJournal of Physics: Conference Series
Volume400
Issue numberPART 2
DOIs
Publication statusPublished - 2012

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cobalt
physical properties
thermoelectric materials
fluorite
room temperature
superconductivity
electrical resistivity
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Physical properties of the novel layered cobalt oxyphosphide Sr 2ScCoPO3. / Okada, S.; Kamihara, Yoichi; Ohkubo, N.; Ban, S.; Matoba, Masanori; Atou, T.

In: Journal of Physics: Conference Series, Vol. 400, No. PART 2, 022091, 2012.

Research output: Contribution to journalArticle

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