Studies on the high-temperature ferroelectric transition of multiferroic hexagonal manganite RMnO3.
J Phys Condens Matter
; 30(10): 105601, 2018 03 14.
Article
en En
| MEDLINE
| ID: mdl-29380748
ABSTRACT
Hexagonal manganites are multiferroic materials with two highly-dissimilar phase transitions a ferroelectric transition (from P63/mmc to P63cm) at a temperature higher than 1000 K and an antiferromagnetic transition at T N = 65-130 K. Despite its critical relevance to the intriguing ferroelectric domain physics, the details of the ferroelectric transition are not well known to date primarily because of the ultra-high transition temperature. Using high-temperature x-ray diffraction experiments, we show that the ferroelectric transition is a single transition of abrupt order and R-Op displacement is the primary order parameter. This structural transition is then simultaneously accompanied by MnO5 tilting and the subsequent development of electric polarization.
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01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Asunto de la revista:
BIOFISICA
Año:
2018
Tipo del documento:
Article