Room temperature Ferrimagnetism and Ferroelectricity in Strained, Thin Films of BiFe_0.5Mn_0.5O_3
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Authors
Choi, Eun Mi
Fix, Thomas
Kursumovic, Ahmed
Kinane, Christy J
Arena, Darío
Bi, Zhenxing
Xiong, Jie
Yan, Li
Lee, Jun-Sik
Wang, Haiyan
Langridge, Sean
Kim, Yong-Min
Borisevich, Albina Y
MacLaren, Ian
Ramasse, Quentin M
Jia, Quanxi
MacManus-Driscoll, Judith L
Publication Date
2014-10-14Journal Title
Advanced Functional Materials
ISSN
1616-301X
Publisher
Wiley
Volume
24
Pages
7478-7487
Language
en_US
Type
Article
Metadata
Show full item recordCitation
Choi, E. M., Fix, T., Kursumovic, A., Kinane, C. J., Arena, D., Sahonta, L., Bi, Z., et al. (2014). Room temperature Ferrimagnetism and Ferroelectricity in Strained, Thin Films of BiFe_0.5Mn_0.5O_3. Advanced Functional Materials, 24 7478-7487. https://doi.org/10.1002/adfm.201401464
Abstract
Highly strained films of BiFe_0.5Mn_0.5O_3 (BFMO) grown at very low rates by pulsed laser deposition were demonstrated to exhibit both ferrimagnetism and ferroelectricity at room temperature and above. Magnetisation measurements demonstrated ferrimagnetism (T_C ~ 600K), with a room temperature saturation moment (M_S) of up to 90 emu/cc (~ 0.58 μ_B/f.u) on high quality (001) SrTiO_3. X-ray magnetic circular dichroism showed that the ferrimagnetism arose from antiferromagnetically coupled Fe^3+ and Mn^3+. While scanning transmission electron microscope studies showed there was no long range ordering of Fe and Mn, the magnetic properties were found to be strongly dependent on the strain state in the films. The magnetism is explained to arise from one of 3 possible mechanisms with Bi polarisation playing a key role. A signature of room temperature ferroelectricity in the films was measured by piezoresponse force microscopy and was confirmed using angular dark field scanning transmission electron microscopy. The demonstration of strain induced, high temperature multiferroism is a promising development for future spintronic and memory applications at room temperature and above.
Sponsorship
European Research Council (247276)
Identifiers
External DOI: https://doi.org/10.1002/adfm.201401464
This record's URL: https://www.repository.cam.ac.uk/handle/1810/245924
Rights
Attribution 2.0 UK: England & Wales, Creative Commons Attribution License 2.0 UK
Licence URL: http://creativecommons.org/licenses/by/2.0/uk/