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Calorimetric study and Landau analysis of the phase transitions in PbZr 1– x Sn x O 3 single crystals with 0 ≤ x ≤ 0.4
Author(s) -
JankowskaSumara Irena
Publication year - 2007
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200642503
Subject(s) - landau theory , phase transition , phase diagram , differential scanning calorimetry , dielectric , condensed matter physics , materials science , thermodynamics , phase (matter) , physics , quantum mechanics , optoelectronics
Differential scanning calorimetry experiments have been performed for PbZr 1– x Sn x O 3 single crystals where 0 ≤ x ≤ 0.4 at the temperature range of 100–600 K. The temperatures and orders of particular phase transitions have been determined and the phase diagram was compared to dielectric measurements. The first order character of the phase transitions in PbZr 1– x Sn x O 3 was discussed. The total transitions energy and entropy at the phase transitions were calculated. The excess specific heat and excess entropy associated with the phase transitions were analysed using Landau theory. The comparison of calorimetric data with the evolution of the order parameter indicates that the phase transitions in PbZr 1– x Sn x O 3 single crystals seem to follow a mean field Landau potential. The results are compared to the earlier dielectric and birefringence experiments. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)