Doping-Induced Structural Phase Transition in Na1.6-xCo[Fe(CN)6]0.902.9H2O
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概要
- 論文の詳細を見る
Lattice structure of hole-doped Na1.6-xCo[Fe(CN)6]0.902.9H2O was systematically investigated against doping level ($x$) and temperature ($T$) by means of synchrotron-radiation powder diffraction. We found that the hole-doping procedure on the Co site induces a rhombohedral–cubic structural phase transition. The rhombohedral phase (cubic phase) is observed in $x \leq 0.02$ and $100 \leq T \leq 300$ K ($x \geq 0.14$ and $100 \leq T \leq 300$ K), while two lattice structures coexist in the intermediate-$x$ region ($0.02 \leq x \leq 0.14$). We interpreted the two-phase region of the $x$–$T$ phase diagram in terms of intrinsic phase separation into large-$x$ (Na+-poor) and small-$x$ (Na+-rich) regions, because the Na+ ions can migrate within the crystal to minimize the total free energy.
- Physical Society of Japanの論文
- 2009-07-15
著者
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Moritomo Yutaka
Graduate School Of Pure And Applied Science University Of Tsukuba
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Igarashi Kazuhiro
Graduate School Of Pure And Applied Science University Of Tsukuba
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Kim Jungeun
Jasri Hyogo Jpn
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Matsuda Tomoyuki
Graduate School Of Pure And Applied Sciences University Of Tsukuba
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Kim Jungeun
JASRI/SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5198
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Matsuda Tomoyuki
Graduate School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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Matsuda Tomoyuki
Graduated School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571
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Moritomo Yutaka
Graduated School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571
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Igarashi Kazuhiro
Graduated School of Pure and Applied Science, University of Tsukuba, Tsukuba, Ibaraki 305-8571
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