Electrical Characterization in the Phase Transition between Cubic PbCrO sub(3) Perovskites at High Pressures

By in situ x-ray diffraction, an isostructural phase transition between two kinds of the cubic PbCrO sub(3) perovskites at around 1.6 GPa and room temperature with a 9.8% volume change is discovered. Recently, we have synthesized this cubic PbCrO sub(3) perovskite successfully. Here we report our hi...

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Published inChinese physics letters Vol. 30; no. 11; pp. 117201 - 1-117201-4
Main Authors WANG, Wen-Dan, HE, Duan-Wei, XIAO, Wan-Sheng, WANG, Shan-Min, XU, Ji-An
Format Journal Article
LanguageEnglish
Published 01.11.2013
Subjects
Diffraction
Electrical properties
Electrical resistance
Perovskites
Phase transformations
Semiconductors
Transformations
X-rays
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Summary:By in situ x-ray diffraction, an isostructural phase transition between two kinds of the cubic PbCrO sub(3) perovskites at around 1.6 GPa and room temperature with a 9.8% volume change is discovered. Recently, we have synthesized this cubic PbCrO sub(3) perovskite 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 I could be considered as a semiconductor according to our present measurement.
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/30/11/117201