High-pressure phase transitions in BiMO_3 (M=Al, Ga, and In): In situ x-ray diffraction and Raman scattering experiments

Hitoshi Yusa; Alexei A. Belik; Eiji Takayama-Muromachi; Naohisa Hirao; Yasuo Ohishi

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High-pressure phase transitions in BiMO_3 (M=Al, Ga, and In): In situ x-ray diffraction and Raman scattering experiments

机译：BiMO_3（M = Al，Ga和In）中的高压相变：原位X射线衍射和拉曼散射实验

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In situ x-ray diffraction and Raman scattering experiments using a diamond anvil cell revealed high-pressure forms of BiMO_3 (M=Al, Ga, and In) under hydrostatic conditions at room temperature. Various perovskite-type structures are found in each compound under pressure up to 11 GPa. However, none of the high-pressure forms was quenched at atmospheric pressure. All of the phase transitions are confirmed to be reversible. During decompression, symmetry changes, R3m to R3c, Cmcm to Cm, and Pnma to Pna2_1 are observed in BiAlO_3, BiGaO_3, and BiInO_3 perovskite, respectively. Structure systematics of the BiMO_3 perovskites is given on the basis of the cationic size of M~(3+).

机译：使用金刚石砧盒的原位X射线衍射和拉曼散射实验显示，在室温下静水压下，BiMO_3（M = Al，Ga和In）的高压形式。在高达11 GPa的压力下，每种化合物中都会发现各种钙钛矿型结构。然而，没有一种高压形式在大气压下被淬灭。确认所有相变都是可逆的。在减压期间，在BiAlO_3，BiGaO_3和BiInO_3钙钛矿中分别观察到对称性变化，R3m至R3c，Cmcm至Cm和Pnma至Pna2_1。根据M〜（3+）的阳离子大小，给出了BiMO_3钙钛矿的结构体系。

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来源
《Physical review》 |2009年第21期|214103.1-214103.10|共10页
作者
Hitoshi Yusa; Alexei A. Belik; Eiji Takayama-Muromachi; Naohisa Hirao; Yasuo Ohishi;
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作者单位

Exploratory Nanomaterials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;

International Center for Materials Nanoarchitechtonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba,Ibaraki 305-0044, Japan;

International Center for Materials Nanoarchitechtonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba,Ibaraki 305-0044, Japan;

Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, 679-5198 Hyogo, Japan;

Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, 679-5198 Hyogo, Japan;

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关键词
crystallographic aspects of phase transformations; pressure effects; infrared and raman spectra;

机译：相变的晶体学方面;压力影响;红外光谱和拉曼光谱;

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High-pressure phase transitions in BiMO_3 (M=Al, Ga, and In): In situ x-ray diffraction and Raman scattering experiments

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