Phase Transition Behavior of LiCr 0.35 Mn0.65O2 under High Pressure by Electrical Conductivity Measurement
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CUI Xiao-Yan,
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HU Ting-Jing,
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HAN Yong-Hao,
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GAO Chun-Xiao,
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PENG Gang,
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LIU Cai-Long,
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WU Bao-Jia,
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WANG Yue,
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LIU Bao,
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REN Wan-Bin,
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LI Yan,
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SU Ning-Ning,
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ZOU Guang-Tian,
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DU Fei,
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CHEN Gang
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Abstract
The electrical conductivity of powdered LiCr 0.35 Mn0.65O2 is measured under high pressure up to 26.22 GPa in the temperature range 300-413 K by using a diamond anvil cell. It is found that both conductivity and activation enthalpy change discontinuously at 5.36 GPa and 21.66 GPa. In the pressure range 1.10-5.36 GPa, pressure increases the activation enthalpy and reduces the carrier scattering, which finally leads to the conductivity increase. In the pressure ranges 6.32-21.66 GPa and 22.60-26.22 GPa, the activation enthalpy decreases with pressure increasing, which has a positive contribution to electrical conductivity increase. Two pressure-induced structural phase transitions are found by in-situ x-ray diffraction under high pressure, which results in the discontinuous changes of conductivity and activation enthalpy.
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Cite this article:
CUI Xiao-Yan, HU Ting-Jing, HAN Yong-Hao, GAO Chun-Xiao, PENG Gang, LIU Cai-Long, WU Bao-Jia, WANG Yue, LIU Bao, REN Wan-Bin, LI Yan, SU Ning-Ning, ZOU Guang-Tian, DU Fei, CHEN Gang. Phase Transition Behavior of LiCr
0.35 Mn
0.65O
2 under High Pressure by Electrical Conductivity Measurement[J].
Chin. Phys. Lett., 2010, 27(3): 036402.
DOI: 10.1088/0256-307X/27/3/036402
CUI Xiao-Yan, HU Ting-Jing, HAN Yong-Hao, GAO Chun-Xiao, PENG Gang, LIU Cai-Long, WU Bao-Jia, WANG Yue, LIU Bao, REN Wan-Bin, LI Yan, SU Ning-Ning, ZOU Guang-Tian, DU Fei, CHEN Gang. Phase Transition Behavior of LiCr 0.35 Mn0.65O2 under High Pressure by Electrical Conductivity Measurement[J]. Chin. Phys. Lett., 2010, 27(3): 036402. DOI: 10.1088/0256-307X/27/3/036402
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CUI Xiao-Yan, HU Ting-Jing, HAN Yong-Hao, GAO Chun-Xiao, PENG Gang, LIU Cai-Long, WU Bao-Jia, WANG Yue, LIU Bao, REN Wan-Bin, LI Yan, SU Ning-Ning, ZOU Guang-Tian, DU Fei, CHEN Gang. Phase Transition Behavior of LiCr 0.35 Mn0.65O2 under High Pressure by Electrical Conductivity Measurement[J]. Chin. Phys. Lett., 2010, 27(3): 036402. DOI: 10.1088/0256-307X/27/3/036402
CUI Xiao-Yan, HU Ting-Jing, HAN Yong-Hao, GAO Chun-Xiao, PENG Gang, LIU Cai-Long, WU Bao-Jia, WANG Yue, LIU Bao, REN Wan-Bin, LI Yan, SU Ning-Ning, ZOU Guang-Tian, DU Fei, CHEN Gang. Phase Transition Behavior of LiCr 0.35 Mn0.65O2 under High Pressure by Electrical Conductivity Measurement[J]. Chin. Phys. Lett., 2010, 27(3): 036402. DOI: 10.1088/0256-307X/27/3/036402
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