Transport properties of The layered transition metal oxypnictide Sr2ScMPO3 with MP layers (M =Mn, Ni and Co0.5Fe0.5)

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

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Polycrystalline samples of novel oxypnictides, Sr2ScMPO3, with MP layer (M Mn, Ni and Co0.5Fe0.5) were synthesized, and their resistivities and Seebeck coefficients were measured. Sr2ScMPO3 crystallizes in a stacked, layered structure comprised of a ThCr2Si2- type MP layer alternating with a K2NiF4-type Sr2ScO3 layer. Sr2ScMnPO3 is an insulator at room temperature. The resistivities (ρ) of Sr2ScNiPO3 and Sr2ScCo0.5Fe0.5PO3 decrease with decreasing temperature like a metal. The Seebeck coefficients (S) of these materials are negative at room temperature. For Sr2ScNiPO3, S initially decreases slightly with decreasing temperature, and increases with decreasing temperature below 50 K. However, for Sr2ScCo0.5Fe0.5PO3, S increases with decreasing temperature, and attains to a positive value below 270 K.

Original languageEnglish
Article number022034
JournalJournal of Physics: Conference Series
Publication statusPublished - 2014


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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