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Effect of electric field on dielectric, ac conduction and ferroelectric behavior of flux‐grown Pb(Zn 1/3 Nb 2/3 ) 0.91 Ti 0.09 O 3 single crystals
Author(s) -
Singh B. K.,
Kumar K.,
Gupta M. K.,
Kumar B.
Publication year - 2010
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925643
Subject(s) - dielectric , monoclinic crystal system , ferroelectricity , materials science , tetragonal crystal system , condensed matter physics , electric field , phase transition , flux method , polarization (electrochemistry) , permittivity , activation energy , piezoelectricity , analytical chemistry (journal) , trigonal crystal system , flux (metallurgy) , thermal conduction , crystallography , single crystal , chemistry , crystal structure , optoelectronics , physics , composite material , metallurgy , chromatography , quantum mechanics , organic chemistry
The temperature dependence of dielectric and piezoelectric behavior of Pb(Zn 1/3 Nb 2/3 ) 0.91 Ti 0.09 O 3 single crystals has been investigated for samples poled at different fields along [0 0 1] direction. An increase in rhombohedral to tetragonal phase‐transition temperature ( T rt ) with dc field was observed due to the polarization rotation via a monoclinic phase. At higher field, a small kink in the dielectric constant near 125 °C was observed, suggesting a field‐induced rhombohedral to monoclinic phase transition. The activation energy for conduction, below T rt , was determined as 0.17, 0.32, and 0.11 eV for the samples poled at 0, 0.5, and 1.0 kV/mm, respectively.
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