標題: | Concurrent transition of ferroelectric and magnetic ordering near room temperature |
作者: | Ko, Kyung-Tae Jung, Min Hwa He, Qing Lee, Jin Hong Woo, Chang Su Chu, Kanghyun Seidel, Jan Jeon, Byung-Gu Oh, Yoon Seok Kim, Kee Hoon Liang, Wen-I Chen, Hsiang-Jung Chu, Ying-Hao Jeong, Yoon Hee Ramesh, Ramamoorthy Park, Jae-Hoon Yang, Chan-Ho 材料科學與工程學系 Department of Materials Science and Engineering |
公開日期: | 1-十一月-2011 |
摘要: | Strong spin-lattice coupling in condensed matter gives rise to intriguing physical phenomena such as colossal magnetoresistance and giant magnetoelectric effects. The phenomenological hallmark of such a strong spin-lattice coupling is the manifestation of a large anomaly in the crystal structure at the magnetic transition temperature. Here we report that the magnetic Neel temperature of the multiferroic compound BiFeO3 is suppressed to around room temperature by heteroepitaxial misfit strain. Remarkably, the ferroelectric state undergoes a first-order transition to another ferroelectric state simultaneously with the magnetic transition temperature. Our findings provide a unique example of a concurrent magnetic and ferroelectric transition at the same temperature among proper ferroelectrics, taking a step toward room temperature magnetoelectric applications. |
URI: | http://dx.doi.org/10.1038/ncomms1576 http://hdl.handle.net/11536/14944 |
ISSN: | 2041-1723 |
DOI: | 10.1038/ncomms1576 |
期刊: | NATURE COMMUNICATIONS |
Volume: | 2 |
起始頁: | 0 |
結束頁: | 0 |
顯示於類別: | 期刊論文 |