Studies on the high-temperature ferroelectric transition of multiferroic hexagonal manganite RMnO3

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Title
Studies on the high-temperature ferroelectric transition of multiferroic hexagonal manganite RMnO3
Author(s)
Hasung Sim; Jaehong Jeong; Haeri Kim; Cheong S.-W.; Je-Geun Park
Publication Date
2018-02
Journal
JOURNAL OF PHYSICS-CONDENSED MATTER, v.30, no.10, pp.105601 -
Publisher
IOP PUBLISHING LTD
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. © 2018 IOP Publishing Ltd
URI
https://pr.ibs.re.kr/handle/8788114/4658
ISSN
0953-8984
Appears in Collections:
Center for Correlated Electron Systems(강상관계 물질 연구단) > Journal Papers (저널논문)
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