DocumentCode :
2981994
Title :
Pyroelectric properties and orthorhombic to rhombohedral electric field induced phase transition in relaxor-ferroelectric single crystals
Author :
Davis, M. ; Damjanovic, D. ; Setter, N.
Author_Institution :
Laboratory of Ceramics, Swiss Fed. Inst. of Technol., Lausanne, Switzerland
fYear :
2004
fDate :
23-27 Aug. 2004
Firstpage :
205
Lastpage :
208
Abstract :
The pyroelectric coefficients of 0.72Pb(Mg13/Nb23/)O3-0.28PbTiO3 (PMN-28PT), 0.67Pb(Mg13/Nb23/)O3-0.33PbTiO3 (PMN-33PT) and 0.92Pb(Zn13/Nb23/)O3-0.08PbTiO3 (PZN-8PT) single crystals, oriented and poled along the [001]c, [101]c and [111]c directions (C: pseudocubic) have been measured using a dynamic method. In otherwise pseudoorthorhombic samples of PZN-8PT, a room temperature rhombohedral phase can be stabilized by poling along the [111]c direction at sub zero temperatures. By strain measurement and in situ polarized light microscopy, the corresponding orthorhombic to rhombohedral electric-field induced phase transition has been observed in [111]c-oriented PZN-SPT upon application of a unipolar field. This last result reiterates the universality of the electric field induced phase transition in ferroelectric materials, especially in such crystals near the morphotropic phase boundary where phases are nearly degenerate.
Keywords :
dielectric polarisation; ferroelectric transitions; lead compounds; pyroelectricity; relaxor ferroelectrics; PMN-PT; PbMgO3NbO3-PT; ferroelectric materials; in situ polarized light microscopy; morphotropic phase boundary; orthorhombic-rhombohedral electric field induced phase transition; poling; pseudocubic structure; pseudoorthorhombic samples; pyroelectric coefficients; pyroelectric properties; relaxor-ferroelectric single crystals; room temperature rhombohedral phase; strain measurement; Crystalline materials; Crystals; Electrodes; Ferroelectric materials; Indium tin oxide; Microscopy; Niobium; Optical polarization; Pyroelectricity; Temperature;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Applications of Ferroelectrics, 2004. ISAF-04. 2004 14th IEEE International Symposium on
ISSN :
1099-4734
Print_ISBN :
0-7803-8410-5
Type :
conf
DOI :
10.1109/ISAF.2004.1418372
Filename :
1418372
Link To Document :
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