The influence of La content in PLZT-x/95/5 ceramics (x =0.5 to 4%) on the dielectric, pyroelectric, thermally stimulated current and Raman scattering measurements and model interpretation

Author

Handerek, J. ; Ujma ; Dmytrow, D. ; Carabatos-Nedelec, C. ; El-Harrad, I.

Author_Institution

Inst. of Phys., Silesian Univ., Poland

fYear

1992

fDate

30 Aug-2 Sep 1992

Firstpage

370

Lastpage

373

Abstract

PLZT (lead lanthanum zirconate titanate) x/95/5 ceramics with low La concentration, x=0.5 to 4 wt.%, exhibit an antiferroelectric (AFE)-ferroelectric (FE)-paraelectric (PE) phase sequence. The FE phase exists in both AFE and PE phases in a wide range. Dielectric, pyroelectric, thermally stimulated current, and Raman scattering measurements have been performed as functions of temperature in all phases. The diffuse character of the phase transitions was confirmed, and the width of the phases coexistence was proved to depend on the La concentration. A model is proposed for interpreting the defects and the phase balance

Keywords

Raman spectra of inorganic solids; antiferroelectric materials; ceramics; crystal defects; dielectric hysteresis; ferroelectric transitions; lanthanum compounds; lead compounds; permittivity; pyroelectricity; thermally stimulated currents; AFE phase; FE phase; La content; PE phases; PLZT; PbLaZrO3TiO3; Raman scattering; antiferroelectric-ferroelectric transition; ceramics; defects; dielectric constant; dielectric hysteresis; ferroelectric-paraelectric transition; pyroelectric current; thermally stimulated current; Ceramics; Current measurement; Dielectric measurements; Iron; Lanthanum; Performance evaluation; Phase measurement; Pyroelectricity; Raman scattering; Titanium compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on

Conference_Location

Greenville, SC

Print_ISBN

0-7803-0465-9

Type

conf

DOI

10.1109/ISAF.1992.300712

Filename

300712