Thermal vibrations in PbTiO3 crystals

Abstract The thermal vibration amplitudes were studied in high temperature paraelectric phase of PbTiO3 crystals. The values of amplitudes were computed first assuming the positions of Pb and Ti ions given by Pm3m space group and then allowing the possibility of random displacements from these positions. Assumption of the random displacements gives essential results only for Pb ions. Therefore the thermal vibrations of Pb rather than Ti ions implicate a disorder in PbTiO3 paraelectric phase.

[1]  J. Dec,et al.  On the Pb thermal vibrations in PbHfO3 crystals , 1994 .

[2]  D. Vanderbilt,et al.  First-principles investigation of ferroelectricity in perovskite compounds. , 1994, Physical review. B, Condensed matter.

[3]  J. Dec,et al.  Structure and disorder in single‐crystal lead zirconate, PbZrO3 , 1993 .

[4]  R. Cohen,et al.  ELECTRONIC-STRUCTURE STUDIES OF THE DIFFERENCES IN FERROELECTRIC BEHAVIOR OF BATIO3 AND PBTIO3 , 1992 .

[5]  V. Kogan,et al.  Peculiarities of structure and phase tranitions in lead-containing ferroelectric perovskites , 1991 .

[6]  J. Gavarri,et al.  X-ray and neutron diffraction studies of the diffuse phase transition in PbMg13Nb23O3 ceramics , 1991 .

[7]  R. Piltz,et al.  Order-disorder behaviour in the transition of PbTiO3 , 1990 .

[8]  M. Fontana,et al.  Displacive to Order-Disorder Crossover in the Cubic-Tetragonal Phase Transition of PbTiO3 , 1990 .

[9]  F. Duan,et al.  Transmission electron microscope studies of paraferroelectric phase transitions in BaTiO3 and KNbO3 , 1988 .

[10]  Schaefer,et al.  Crystal optical studies of precursor and spontaneous polarization in PbTiO3. , 1986, Physical review. B, Condensed matter.

[11]  L. Zeng,et al.  Crystal structure of BaTiO3 in the cubic phase , 1985 .

[12]  A. Glazer,et al.  Lattice parameters and birefringence in PbTiO3 single crystals , 1979 .

[13]  M. Lambert,et al.  The chain structure of BaTiO3 and KNbO3 , 1968 .

[14]  Y. Gondō,et al.  On the Magneto-Thermoelectric Power of Iron Crystal at High Temperature , 1951 .