Successive phase transitions in the highly ordered complex perovskite PbLu sub(1/2)Nb sub(1/2)O sub(3)

The structural phase transitions and the electrical behaviour of the complex perovskite PbLu sub(1/2)Nb sub(1/2)O sub(3) have been investigated using X-ray powder diffraction, dielectric constant measurements, differential scanning calorimetry and measurement of the polarization as a function of app...

Full description

Saved in:
Bibliographic Details
Published inPhase transitions Vol. 68; no. 2; pp. 411 - 421
Main Authors Park, Yung, Knowles, Kevin M, Cho, Kurn
Format Journal Article
LanguageEnglish
Published 01.01.1999
Online AccessGet full text

Cover

More Information
Summary:The structural phase transitions and the electrical behaviour of the complex perovskite PbLu sub(1/2)Nb sub(1/2)O sub(3) have been investigated using X-ray powder diffraction, dielectric constant measurements, differential scanning calorimetry and measurement of the polarization as a function of applied electric field. The high-temperature paraelectric phase is highly ordered. A first-order paraelectric-antiferroelectric phase transition occurs at 270 degree C and an antiferroelectric-ferroelectric phase transition, characterized by dispersion in the curves of dielectric constant as a function of temperature, occurs at approximately 30 degree C. The antiferroelectric phase is isostructural with the orthorhombic form of PbYb sub(1/2)Nb sub(1/2)O sub(3). The low-temperature ferroelectric phase also has an orthorhombic crystal structure.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Feature-1
ISSN:0141-1594