Dielectric spectra of a new relaxor ferroelectric system Ba2LnTi2Nb3O15 (Ln=La, Nd)
S. Kamba, S. Veljko, M. Kempa, M. Savinov, V. Bovtun, P. Vanek, J., Petzelt, M.C. Stennett, I.M. Reaney, A.R. West
TL;DR
This paper reports the synthesis and dielectric characterization of a new relaxor ferroelectric system, revealing distinct relaxor and ferroelectric behaviors with specific phase transition temperatures.
Contribution
It introduces a new relaxor ferroelectric system, BLTN, with detailed dielectric spectra and phase transition properties, expanding understanding of relaxor materials.
Findings
BLTN shows a smeared permittivity maximum characteristic of relaxors.
BNTN exhibits a first-order ferroelectric phase transition at 389 K.
BLNTN displays both ferroelectric transition at 274 K and relaxor behavior at higher temperatures.
Abstract
New relaxor ferroelectric system has been synthesized. BLTN exhibits a smeared maximum of permittivity, characteristic of classic relaxor behaviour, with a peak shift from 185 K at 100 Hz to 300 K at 1 GHz. BNTN undergoes a first order ferroelectric phase transition at 389 K and BLNTN exhibits both a ferroelectric phase transition at 274 K and relaxor behaviour at higher temperatures.
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Taxonomy
TopicsFerroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Solid-state spectroscopy and crystallography