Wang, J. ; Neaton, J. B. ; Zheng, H. ; Nagarajan, V. ; Ogale, S. B. ; Liu, B. ; Viehland, D. ; Vaithyanathan, V. ; Schlom, D. G. ; Waghmare, U. V. ; Spaldin, N. A. ; Rabe, K. M. ; Wuttig, M. ; Ramesh, R. (2003) Epitaxial BiFeO3 multiferroic thin film heterostructures Science, 299 (5613). pp. 1719-1722. ISSN 0036-8075
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Official URL: http://www.sciencemag.org/content/299/5613/1719.sh...
Related URL: http://dx.doi.org/10.1126/science.1080615
Abstract
Enhancement of polarization and related properties in heteroepitaxially constrained thin films of the ferroelectromagnet, BiFeO3, is reported. Structure analysis indicates that the crystal structure of film is monoclinic in contrast to bulk, which is rhombohedral. The films display a room-temperature spontaneous polarization (50 to 60 microcoulombs per square centimeter) almost an order of magnitude higher than that of the bulk (6.1 microcoulombs per square centimeter). The observed enhancement is corroborated by first-principles calculations and found to originate from a high sensitivity of the polarization to small changes in lattice parameters. The films also exhibit enhanced thickness-dependent magnetism compared with the bulk. These enhanced and combined functional responses in thin film form present an opportunity to create and implement thin film devices that actively couple the magnetic and ferroelectric order parameters.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Association for the Advancement of Science. |
| ID Code: | 59412 |
| Deposited On: | 06 Sep 2011 05:20 |
| Last Modified: | 06 Jul 2012 08:20 |
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