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arXiv 1111.4855cond-mat.str-el
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GdMnO3在50 GPa下的结构和绝缘体-金属相变

Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3

J. Agostinho Moreira, A. Almeida, J. Oliveira, V. H. Rodrigues, M. M. R. Costa, P. B. Tavares, P. Bouvier, M. Guennou, J. Kreisel

摘要:

我们提出了一个非常高的压力上的正交钙钛矿GdMnO 3的拉曼光谱和同步辐射X射线衍射高达53.2 GPa的效果的研究。实验结果产生的结构和绝缘体到金属的相变接近50 GPa,从斜方晶系到公制立方结构。相变是一级的压力滞后约6 GPa。在非常高的压力下观察到的行为很可能是稀土锰氧化物的一般特征。

英文摘要:

We present a study of the effect of very high pressure on the orthorhombic perovskite GdMnO3 by Raman spectroscopy and synchrotron x-ray diffraction up to 53.2 GPa. The experimental results yield a structural and insulator-to-metal phase transition close to 50 GPa, from an orthorhombic to a metrically cubic structure. The phase transition is of first order with a pressure hysteresis of about 6 GPa. The observed behavior under very high pressure might well be a general feature in rare-earth manganites.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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