标题: | 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. 材料科学与工程学系 电子物理学系 Department of Materials Science and Engineering Department of Electrophysics |
公开日期: | 1-三月-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 |
起始页: | 0 |
结束页: | 0 |
显示于类别: | Articles |
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