Fe3O4/-CD的高压电学性质研究

张东梅; 肖宏宇; 张永胜; 韩永昊; 高春晓

doi:10.11858/gywlxb.2012.06.010

Fe3O4/-CD的高压电学性质研究

doi: 10.11858/gywlxb.2012.06.010

1.
洛阳理工学院数理部，河南洛阳 471023；
2.
吉林大学超硬材料国家重点实验室，吉林长春 130012

详细信息

通讯作者:
高春晓 E-mail:cxgao599@yahoo.com.cn

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出版历程
- 收稿日期: 2011-06-07
- 修回日期: 2011-07-09
- 发布日期: 2012-12-15

Electrical Property of Fe3O4/-CD under High Pressure

1.
Luoyang Institute of Science and Technology, Luoyang 471023, China;
2.
National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

摘要

摘要: 高压下的电学性质测量是获得材料物理性质的有效手段。利用集成在金刚石对顶砧上的薄膜微电路，测量了高压下Fe3O4/-CD（-糊精）的电导率，并分析了电导率随压力的变化关系。在0～39.9 GPa范围内，Fe3O4/-CD的电导率随压力的增加而逐渐增大，并呈半导体的特征；而在17.0 GPa处其电导率发生突变，表明样品发生了高压相变。在卸压过程中，电导率随压力的变化呈线性关系，并且卸压后样品的电导率不能回到最初的状态，推测这是一个不可逆的高压结构相变。
- 高压 /
- Fe3O4/-CD /
- 电导率
Abstract: Electrical measurement under high pressure is an effective means to obtain physical property of materials. Using a microcircuit fabricated on a diamond anvil cell (DAC), we carried out the in-situ conductivity measurement on Fe3O4/-CD at pressures. The electrical conductivity of the sample increases with pressure increasing to 39.9 GPa, experimental results indicate that Fe3O4/-CD presents the transport behavior of a semiconductor. The abnormal conductivity changes at about 17.0 GPa is caused by the structural phase transition to high-pressure phase. The electrical conductivity indicates linear relation with pressure and can not return to original state, when the pressure comes back to ambient. As a result, we speculate high-pressure phase transition is not reversible.
- high pressure /
- Fe3O4/-CD /
- electrical conductivity

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参考文献(11)

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