Thermal vibrations and the structure of quasi-two-dimensional R
2CuO4 crystals (R=La, Pr, Nd, Sm, Eu, and Gd) |
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| Authors: | E I Golovenchits V A Sanina A A Levin Yu F Shepelev Yu I Smolin |
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| Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia;(2) Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, ul. Odoevskogo 24/2, St. Petersburg, 199155, Russia;(3) Institute of Crystallography and Solid-State Physics, Technical University, Dresden, D-1062, Germany |
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| Abstract: | Thermal vibrations of ions in R 2CuO4 crystals (R=La, Pr, Nd, Sm, Eu, Gd) were studied by x-ray diffractometry. A comparative analysis of thermal displacements of the copper and rare-earth ions permitted a conclusion as to the main interactions responsible for the structural state of the CuO2 sheets and of a crystal as a whole. The structural properties were found to correlate with the magnitude of the ionic radius and with the ground state of the rare-earth ions. |
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