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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2 Citations (Scopus)

Abstract

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
Volume568
DOIs
Publication statusPublished - 2014

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transport properties
transition metals
Seebeck effect
electrical resistivity
temperature
room temperature
insulators
coefficients
metals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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title = "Transport properties of The layered transition metal oxypnictide Sr2ScMPO3 with MP layers (M =Mn, Ni and Co0.5Fe0.5)",
abstract = "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.",
author = "S. Okada and Yoichi Kamihara and N. Ohkubo and S. Ban and Masanori Matoba",
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journal = "Journal of Physics: Conference Series",
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TY - JOUR

T1 - Transport properties of The layered transition metal oxypnictide Sr2ScMPO3 with MP layers (M =Mn, Ni and Co0.5Fe0.5)

AU - Okada, S.

AU - Kamihara, Yoichi

AU - Ohkubo, N.

AU - Ban, S.

AU - Matoba, Masanori

PY - 2014

Y1 - 2014

N2 - 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.

AB - 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.

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