Chemical and Physical Pressure Effects on the Magnetic and Transport Properties of the A-Site Ordered Perovskite Sr3YCo4O10.5
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概要
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We have measured and analysed the magnetization, resistivity and thermopower of polycrystalline samples of Ca-subsituted Sr3YCo4O10.5. 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 physical-pressure effect is semiquantitatively consistent with the chemical-pressure effect.
- Physical Society of Japanの論文
- 2009-09-15
著者
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Matsubayashi Kazuyuki
The Institute For Solid State Physics Tokyo University
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Yamauchi Hisao
Material And Structures Laboratory Tokyo Institute Of Technology
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Terasaki Ichiro
Department Of Applied Physics The University Of Tokyo
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Karppinen Maarit
Materials and Structures Laboratory, Tokyo Institute of Technology
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Uwatoko Yoshiya
The Institute For Solid State Physics The University Of Tokyo
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Kobayashi Wataru
Department Of Applied Physics Waseda University
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Yoshida Shin
Department Of Applied Physics Waseda University
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Nakano Tomohito
Department Of Information Science Gifu University
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Terasaki Ichiro
Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555
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Grigoraviciute Inga
Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori, Yokohama 226-8503
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Karppinen Maarit
Materials and Structures Laboratory, Tokyo Institute of Technology, Nagatsuta, Midori, Yokohama 226-8503
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Uwatoko Yoshiya
The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581
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Matsubayashi Kazuyuki
The Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581
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Kobayashi Wataru
Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555
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Yoshida Shin
Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555
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Nakano Tomohito
Department of Applied Physics, Waseda University, 3-4-1 Okubo, Shinjuku, Tokyo 169-8555
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