Chemical and physical pressure effects on the magnetic and transport properties of the A-Site ordered perovskite Sr3YCo4O 10.5

Shin Yoshida; Wataru Kobayashi; Tomohito Nakanoy; Ichiro Terasaki; Kazuyuki Matsubayashi; Yoshiya Uwatoko; Inga Grigoraviciute; Maarit Karppinen; Hisao Yamauchi

doi:10.1143/JPSJ.78.094711

Chemical and physical pressure effects on the magnetic and transport properties of the A-Site ordered perovskite Sr₃YCo₄O _10.5

Shin Yoshida^*, Wataru Kobayashi, Tomohito Nakanoy, Ichiro Terasaki, Kazuyuki Matsubayashi, Yoshiya Uwatoko, Inga Grigoraviciute, Maarit Karppinen, Hisao Yamauchi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

We have measured and analysed the magnetization, resistivity and thermopower of polycrystalline samples of Ca-subsituted Sr₃YCo ₄O_10.5. While the transition temperature and thermopower systematically decrease with increasing Ca content, the resistivity is nearly independent of the Ca-substitution level. We have furhter found that the substitution of Ca for Sr systematically decreases the lattice paremeters while maintaining the oxygen content unchanged, and have explained the Ca-substitution effects in terms of the spin-state transition induced by chemical pressure. We have also measured the magnetization of one of the samples under hydrostatic pressure. The result shows that the physicalpressure effect is semiquantitatively consistent with the chemical-pressure effect.

Original language	English
Article number	094711
Journal	Journal of the Physical Society of Japan
Volume	78
Issue number	9
DOIs	https://doi.org/10.1143/JPSJ.78.094711
Publication status	Published - 2009 Sept

Keywords

Magnetic order
Perovskite cobalt oxide
Pressure effects
Spin-state transition
Thermoelectric

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.78.094711

Cite this

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title = "Chemical and physical pressure effects on the magnetic and transport properties of the A-Site ordered perovskite Sr3YCo4O 10.5",

abstract = "We have measured and analysed the magnetization, resistivity and thermopower of polycrystalline samples of Ca-subsituted Sr3YCo 4O10.5. While the transition temperature and thermopower systematically decrease with increasing Ca content, the resistivity is nearly independent of the Ca-substitution level. We have furhter found that the substitution of Ca for Sr systematically decreases the lattice paremeters while maintaining the oxygen content unchanged, and have explained the Ca-substitution effects in terms of the spin-state transition induced by chemical pressure. We have also measured the magnetization of one of the samples under hydrostatic pressure. The result shows that the physicalpressure effect is semiquantitatively consistent with the chemical-pressure effect.",

keywords = "Magnetic order, Perovskite cobalt oxide, Pressure effects, Spin-state transition, Thermoelectric",

author = "Shin Yoshida and Wataru Kobayashi and Tomohito Nakanoy and Ichiro Terasaki and Kazuyuki Matsubayashi and Yoshiya Uwatoko and Inga Grigoraviciute and Maarit Karppinen and Hisao Yamauchi",

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T1 - Chemical and physical pressure effects on the magnetic and transport properties of the A-Site ordered perovskite Sr3YCo4O 10.5

AU - Yoshida, Shin

AU - Kobayashi, Wataru

AU - Nakanoy, Tomohito

AU - Terasaki, Ichiro

AU - Matsubayashi, Kazuyuki

AU - Uwatoko, Yoshiya

AU - Grigoraviciute, Inga

AU - Karppinen, Maarit

AU - Yamauchi, Hisao

PY - 2009/9

Y1 - 2009/9

N2 - We have measured and analysed the magnetization, resistivity and thermopower of polycrystalline samples of Ca-subsituted Sr3YCo 4O10.5. While the transition temperature and thermopower systematically decrease with increasing Ca content, the resistivity is nearly independent of the Ca-substitution level. We have furhter found that the substitution of Ca for Sr systematically decreases the lattice paremeters while maintaining the oxygen content unchanged, and have explained the Ca-substitution effects in terms of the spin-state transition induced by chemical pressure. We have also measured the magnetization of one of the samples under hydrostatic pressure. The result shows that the physicalpressure effect is semiquantitatively consistent with the chemical-pressure effect.

AB - We have measured and analysed the magnetization, resistivity and thermopower of polycrystalline samples of Ca-subsituted Sr3YCo 4O10.5. While the transition temperature and thermopower systematically decrease with increasing Ca content, the resistivity is nearly independent of the Ca-substitution level. We have furhter found that the substitution of Ca for Sr systematically decreases the lattice paremeters while maintaining the oxygen content unchanged, and have explained the Ca-substitution effects in terms of the spin-state transition induced by chemical pressure. We have also measured the magnetization of one of the samples under hydrostatic pressure. The result shows that the physicalpressure effect is semiquantitatively consistent with the chemical-pressure effect.

KW - Magnetic order

KW - Perovskite cobalt oxide

KW - Pressure effects

KW - Spin-state transition

KW - Thermoelectric

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