Electrical Characterization in the Phase Transition between Cubic PbCrO3 Perovskites at High Pressures
WANG Wen-Dan1, HE Duan-Wei1,3**, XIAO Wan-Sheng2, WANG Shan-Min1, XU Ji-An1,3
1Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065 2Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640 3Institute of Fluid Physics and National Key Laboratory of Shockwave and Detonation Physics, China Academy of Engineering Physics, Mianyang 621900
Abstract：By in situ x-ray diffraction, an isostructural phase transition between two kinds of the cubic PbCrOperovskites at around 1.6 GPa and room temperature with a 9.8% volume change is discovered. Recently, we have synthesized this cubic PbCrO3perovskite successfully. Here we report our high-pressure in situ electrical resistance measurements up to 4.1 GPa for this perovskite sample. At room temperature, the resistance shows special changes at 1.2 and 2.7 GPa. They may indicate the starting and ending points of this transformation. At 4.1 GPa, the negative temperature resistance coefficient is observed, which means that phase II could be considered as a semiconductor according to our present measurement.
(Crystallographic aspects of phase transformations; pressure effects)
引用本文:
. [J]. 中国物理快报, 2013, 30(11): 117201-117201.
WANG Wen-Dan, HE Duan-Wei, XIAO Wan-Sheng, WANG Shan-Min, XU Ji-An. Electrical Characterization in the Phase Transition between Cubic PbCrO3 Perovskites at High Pressures. Chin. Phys. Lett., 2013, 30(11): 117201-117201.
2013, Vol. 30 
