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arXiv 1401.6969cond-mat.mtrl-sci
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多铁性材料MnWO4在39 GPa准静水压力下的室温振动特性

Room-temperature vibrational properties of multiferroic MnWO4 under quasi-hydrostatic compression up to 39 GPa

J. Ruiz-Fuertes, D. Errandonea, O. Gomis, A. Friedrich, F. J. Manjon

摘要:

在室温、准流体静力学条件下(39.3GPa),对多铁性钨酸锰(MnWO4)进行了高压拉曼光谱研究。低压黑钨矿相经历了相变在25.7 GPa,约8 GPa的压力高于在以前的作品中发现的,其中使用较少的流体静力学压力传输介质。的压力依赖性的拉曼活性模式的低压和高压相的报道和讨论比较,在文献中的MnWO4和相关的黑钨矿的结果。根据最低频率的拉曼模的强度线性下降直到相变结束,提出了从低压相到高压相的逐渐压力诱导相变。

英文摘要:

The multiferroic manganese tungstate (MnWO4) has been studied by high-pressure Raman spectroscopy at room temperature under quasi-hydrostatic conditions up to 39.3 GPa. The low-pressure wolframite phase undergoes a phase transition at 25.7 GPa, a pressure around 8 GPa higher than that found in previous works which used less hydrostatic pressure-transmitting media. The pressure dependence of the Raman active modes of both the low- and high-pressure phases are reported and discussed comparing with the results available in the literature for MnWO4 and related wolframites. A gradual pressure-induced phase transition from the low- to the high- pressure phase is suggested on the basis of the linear intensity decrease of the Raman mode with the lowest frequency up to the end of the phase transition.

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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