Dielectric and Ultrasonic Investigation of Phase Transitions in PbFe1/2Nb1/2O3Ceramics

6533b836fe1ef96bd12a1203

RESEARCH PRODUCT

Dielectric and Ultrasonic Investigation of Phase Transitions in PbFe1/2Nb1/2O3Ceramics

J. Banys Vytautas Samulionis K. Bormanis Anna Kalvane Martynas Kinka

subject

Phase transition Materials science Condensed matter physics Attenuation Dielectric Condensed Matter Physics Piezoelectricity Ferroelectricity Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Nuclear magnetic resonance visual_art Phase (matter)visual_art.visual_art_medium Ultrasonic sensor Ceramic

description

We have investigated dielectric and acoustic properties of PbFe1/2Nb1/2O3 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.

year	journal	country	edition	language
2012-01-01	Ferroelectrics

https://doi.org/10.1080/00150193.2012.743371

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