Abstract
Orthorhombic lithium cuprate LiCu2O2 was exposed to high temperature and pressure of 950°C and 4.5 GPa. X-ray diffraction studies indicate that the treated samples of LiCu2O2 had tetragonal symmetry, in contrast to the orthorhombic one of the phase synthesized at atmospheric pressure. Temperature dependences of dielectric permittivity ε and tangent of dielectric loss tanδ, as well as DC (direct current), resistivity, ρ were investigated in the temperature range 77–296 K. No anomalous changes of the studied parameters inherent in the phase transitions were detected in this temperature range. The ρ(T) dependences were common to semiconductors. These dependences were linearized in the Mott coordinates logρ–1/T 0.25. It indicated the variable length hopping mechanism of conduction between the next nearest neighbors in the studied samples.
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ACKNOWLEDGMENTS
The equipment of the Center for Collective Use of RTU MIREA was used for the current investigation.
Funding
The reported study was funded by Russian Foundation for Basic Research, project number 20-02-00915.
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Serovaiskii, A.Y., Kutcherov, V.G., Vinokurov, V.A. et al. Investigation of the LiCu2O2 Phase Samples Treated under High Thermobaric Conditions. Crystallogr. Rep. 66, 1060–1065 (2021). https://doi.org/10.1134/S1063774521060328
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DOI: https://doi.org/10.1134/S1063774521060328