PreprintCC BY 4.0arXiv
Unusual phase coexistence regime across the ferroelectric - paraelectric transition
Abstract
A PbTiO3 epitaxial thin film grown on a DyScO3 substrate was studied by x-ray diffraction in the temperature range of 20-500 degrees Celsius. It is found that the ferroelectric to paraelectric phase transition proceeds through a peculiar transitional coexistence state extending between 402 degrees Celsius and 414 degrees Celsius. Within this temperature interval, at a temperature of 405 degrees Celsius, a domain structure transition occurs, at which the three-domain c/a1/a2 polytwin phase transforms into an ordinary c/a2 twinned phase. It is proposed that the coexistence of two independent twinned phases with the paraelectric phase is enabled by vertical strain gradients in the film.
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BibTeX
@misc{kopecky2026unusual,
title = {{Unusual phase coexistence regime across the ferroelectric - paraelectric transition}},
author = {M. Kopecký and J. Kub and E. de Prado and J. Hlinka},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.12071},
eprint = {2609.12071},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.12071},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Unusual phase coexistence regime across the ferroelectric - paraelectric transition
AU - M. Kopecký
AU - J. Kub
AU - E. de Prado
AU - J. Hlinka
PY - 2026
DA - 2026/09/10
PB - arXiv
DO - 10.48550/arxiv.2609.12071
UR - https://arxiv.org/abs/2609.12071
AB - A PbTiO3 epitaxial thin film grown on a DyScO3 substrate was studied by x-ray diffraction in the temperature range of 20-500 degrees Celsius. It is found that the ferroelectric to paraelectric phase transition proceeds through a peculiar transitional coexistence state extending between 402 degrees Celsius and 414 degrees Celsius. Within this temperature interval, at a temperature of 405 degrees Celsius, a domain structure transition occurs, at which the three-domain c/a1/a2 polytwin phase transforms into an ordinary c/a2 twinned phase. It is proposed that the coexistence of two independent twinned phases with the paraelectric phase is enabled by vertical strain gradients in the film.
ER -