高压下Sr2FeMoxNb1-xO6 (x=0, 0.3)的电学性质和结构稳定性

赵旭; 禹日成; 李凤英; 刘振兴; 鲍忠兴; 唐贵德; 刘景; 靳常青

doi:10.11858/gywlxb.2003.04.010

高压下Sr2FeMoxNb1-xO6 (x=0, 0.3)的电学性质和结构稳定性

doi: 10.11858/gywlxb.2003.04.010

赵旭^1,2,3,,
禹日成^1,2,
李凤英^1,2,
刘振兴^1,2,
鲍忠兴^1,2,
唐贵德³,
刘景²,
靳常青^1,2

1.
中国科学院物理研究所，北京 100080；
2.
北京高压科学研究中心，北京 100080；
3.
河北师范大学物理系，河北石家庄 050016

详细信息

通讯作者:
赵旭

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出版历程
- 收稿日期: 2003-03-17
- 修回日期: 2003-05-20
- 发布日期: 2003-12-05

Electrical Properties and Structural Stability of Sr2FeMoxNb1-xO6 (x=0, 0.3) under High Pressure

1.
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China;
2.
Beijing High Pressure Research Center, Beijing 100080, China;
3.
Department of Physics, Hebei Normal University, Shijiazhuang 050016, China

More Information

Corresponding author: ZHAO Xu

摘要

摘要: 采用金刚石压砧高压装置，研究了双钙态矿结构化合物Sr2FeNbO6及其掺杂物Sr2FeMo0.3Nb0.7O6在室温下，20 GPa内电阻和电容随压力的变化，并发现Sr2FeNbO6在7.5 GPa左右压力下发生了相变，而Sr2FeMo0.3Nb0.7O6的相变发生在2.8 GPa左右。并结合这两个样品的高压下的同步辐射能散X射线衍射实验，进一步证明了这两种相变是电子结构相变引起的。
- 同步辐射 /
- 双钙钛矿结构 /
- 磁电阻 /
- 结构相变
Abstract: The resistance-pressure and capacitance-pressure relationships for double perovskite compound Sr2FeMoxNb1-xO6 (x=0, 0.3) have been studied in the pressure range of 0~20 GPa using a diamond anvil cell at room temperature. The experimental results indicate that Sr2FeNbO6 undergoes a structural transition at about 7.5 GPa while Sr2FeMo0.3Nb0.7O6 at about 2.8 GPa. According to the analysis of energy dispersive X-ray diffraction with synchrotron radiation, these are considered as electronic structure transitions caused by high pressure.
- synchrotron radiation /
- double perovskite /
- magnetoresistance /
- structural transition

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参考文献(8)

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