In-situ high pressure Raman spectrum and electrical property of PbMoO 4

Cui Ling Yu, Qing Jiang Yu, Chun Xiao Gao, Bao Liu, Ai Min Hao, Chun Yuan He, Xiao Wei Huang, Dong Mei Zhang, Xiao Yan Cui, Ming Li, Dong Mei Li, Yan Zhang Ma, Guang Tian Zou

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4 Scopus citations

Abstract

In-situ high pressure Raman spectra and electrical conductivity measurements of scheelite-structure compound PbMoO 4 are presented. The Raman spectrum of PbMoO 4 is determined up to 26.5GPa on a powdered sample in a diamond anvil cell (DAC) under nonhydrostatic conditions. The PbMoO 4 gradually experiences the transformation from the crystal to amorphous between 9.2 and 12.5GPa. The crystal to amorphous transition may be due to the mechanical deformation and the crystallographic transformation. Furthermore, the electrical conductivity of PbMoO 4 is in situ measured accurately using a microcircuit fabricated on a DAC based on the van der Pauw method. The results show that the electrical conductivity of PbMoO 4 increases with increases of pressure and temperature. At 26.5GPa, the electrical conductivity value of PbMoO 4 at 295K is 1.93×10 -4S/cm, while it raises by one order of magnitude at 430K and reached 3.33×10 -3S/cm. However, at 430K, compared with the electrical conductivity value of PbMoO 4 at 26.5GPa, it drops by about two order magnitude at 7.4GPa and achieves 2.81×10 -5S/cm. This indicates that the effect of pressure on the electrical conductivity of PbMoO 4 is more obvious than that of temperature.

Original languageEnglish
Article number014
Pages (from-to)2204-2207
Number of pages4
JournalChinese Physics Letters
Volume24
Issue number8
DOIs
StatePublished - Aug 1 2007

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