Title of article :
Features of phase transitions in lanthanum-modified lead zirconate titanate ferroelectric ceramics
Author/Authors :
Pelلiz-Barranco، نويسنده , , A. and Mendoza، نويسنده , , M.E. and Calderَn-Piٌar، نويسنده , , F. and Garcيa-Zaldيvar، نويسنده , , O. and Lَpez-Noda، نويسنده , , R. and de los Santos-Guerra، نويسنده , , J. and Eiras، نويسنده , , J. Antonio، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
4
From page :
425
To page :
428
Abstract :
The dielectric behavior and the ferroelectric properties (hysteresis loops) of Pb0.94La0.06(Zr0.80Ti0.20)0.985O3 ferroelectric ceramics are analyzed considering the coexistence of the ferroelectric (FE) and the antiferroelectric (AFE) phases. The x-ray diffraction patterns and polarized light microscopy results reveal that FE and AFE ordering coexist. The dielectric analysis suggests two phase transitions. The first around 75 ∘C, which is associatted to a ferroelectric (rhombohedral)–antiferroelectric (orthorhombic) phase transition; the second around 120 ∘C, associated with an antiferroelectric (orthorhombic)–paraelectric (cubic) phase transition. The temperature dependence of hysteresis loops shows a double-loop-like behavior for temperatures above 75 ∘C, showing a typical characteristic of an induced ferroelectric-antiferroelectric transformation.
Keywords :
A. Ferroelectrics , A. Antiferroelectrics , C. Structure , D. Dielectric response
Journal title :
Solid State Communications
Serial Year :
2007
Journal title :
Solid State Communications
Record number :
1764045
Link To Document :
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