Dielectric and Ultrasonic Investigation of Phase Transitions in PbFe1/2Nb1/2O3 Ceramics

We have investigated dielectric and acoustic properties of PbFe 1/2 Nb 1/2 O 3 ceramics, obtained by conventional ceramic technology, in 120-450 K temperature interval. Dielectric response showed diffused dielectric permittivity maximum caused by ferroelectric phase transition around 380 K, but no d...

Full description

Saved in:
Bibliographic Details
Published inFerroelectrics Vol. 440; no. 1; pp. 93 - 99
Main Authors Kinka, M., Samulionis, V., Banys, J., Kalvane, A., Bormanis, K.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 01.01.2012
Subjects
ferroelectric
PFN
ultrasonic velocity and attenuation
Online AccessGet full text

Cover

More Information
Summary:We have investigated dielectric and acoustic properties of PbFe 1/2 Nb 1/2 O 3 ceramics, obtained by conventional ceramic technology, in 120-450 K temperature interval. Dielectric response showed diffused dielectric permittivity maximum caused by ferroelectric phase transition around 380 K, but no dielectric anomalies associated with magnetic phase transition at low temperatures were observed. Formation of the polar phase was confirmed by ultrasonically detected piezoelectric sensitivity. Ultrasonic investigations using pulse-echo method showed two anomalous regions in temperature dependencies of ultrasonic velocity and attenuation, associated with magnetic and ferroelectric phase transitions.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2012.743371