標題: Electrically controllable spontaneous magnetism in nanoscale mixed phase multiferroics
作者: He, Q.
Chu, Y. -H.
Heron, J. T.
Yang, S. Y.
Liang, W. I.
Kuo, C. Y.
Lin, H. J.
Yu, P.
Liang, C. W.
Zeches, R. J.
Kuo, W. C.
Juang, J. Y.
Chen, C. T.
Arenholz, E.
Scholl, A.
Ramesh, R.
材料科學與工程學系
電子物理學系
Department of Materials Science and Engineering
Department of Electrophysics
公開日期: 1-Mar-2011
摘要: Magnetoelectrics and multiferroics present exciting opportunities for electric-field control of magnetism. However, there are few room-temperature ferromagnetic-ferroelectrics. Among the various types of multiferroics the bismuth ferrite system has received much attention primarily because both the ferroelectric and the antiferromagnetic orders are quite robust at room temperature. Here we demonstrate the emergence of an enhanced spontaneous magnetization in a strain-driven rhombohedral and super-tetragonal mixed phase of BiFeO(3). Using X-ray magnetic circular dichroism-based photoemission electron microscopy coupled with macroscopic magnetic measurements, we find that the spontaneous magnetization of the rhombohedral phase is significantly enhanced above the canted antiferromagnetic moment in the bulk phase, as a consequence of a piezomagnetic coupling to the adjacent tetragonal-like phase and the epitaxial constraint. Reversible electric-field control and manipulation of this magnetic moment at room temperature is also shown.
URI: http://dx.doi.org/10.1038/ncomms1221
http://hdl.handle.net/11536/9172
ISSN: 2041-1723
DOI: 10.1038/ncomms1221
期刊: NATURE COMMUNICATIONS
Volume: 2
起始頁: 0
結束頁: 0
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