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Electric-field-induced spin disorder-to-order transition near a multiferroic triple phase point

Title
Electric-field-induced spin disorder-to-order transition near a multiferroic triple phase point
Authors
Jang, B.-KLee, J.HChu, KSharma, PKim, G.-YKo, K.-TKim, K.-EKim, Y.-JKang, KJang, H.-BJang, HJung, M.HSong, KKoo, T.YCHOI, SI YOUNGSeidel, JJeong, Y.HOhldag, HLee, J.-SYang, C.-H.
POSTECH Authors
Jeong, Y.H
Date Issued
Feb-2017
Publisher
Nature
Abstract
The emergence of a triple phase point in a two-dimensional parameter space (such as pressure and temperature) can offer unforeseen opportunities for the coupling of two seemingly independent order parameters. On the basis of this, we demonstrate the electric control of magnetic order by manipulating chemical pressure: lanthanum substitution in the antiferromagnetic ferroelectric BiFeO3. Our demonstration relies on the finding that a multiferroic triple phase point of a single spin-disordered phase and two spin-ordered phases emerges near room temperature in Bi0.9La0.1FeO3 ferroelectric thin films. By using spatially resolved X-ray absorption spectroscopy, we provide direct evidence that the electric poling of a particular region of the compound near the triple phase point results in an antiferromagnetic phase while adjacent unpoled regions remain magnetically disordered, opening a promising avenue for magnetoelectric applications at room temperature.
URI
http://oasis.postech.ac.kr/handle/2014.oak/38024
DOI
10.1038/NPHYS3902
ISSN
1745-2473
Article Type
Article
Citation
NATURE PHYSICS, vol. 13, no. 2, page. 189 - 196, 2017-02
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 JEONG, YOON HEE
Dept of Physics
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