Ferroelectric Sm-doped BiMnO_3 Thin Films with Ferromagnetic Transition Temperature Enhanced to 140 K
Choi, Eun Mi
Lee, Oon Jew
MacManus-Driscoll, Judith L
ACS Applied Materials & Interfaces
American Chemical Society
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Choi, E. M., Kursumovic, A., Lee, O. J., Kleibeuker, J., Chen, A., Zhang, W., Wang, H., & et al. (2014). Ferroelectric Sm-doped BiMnO_3 Thin Films with Ferromagnetic Transition Temperature Enhanced to 140 K. ACS Applied Materials & Interfaces, 6 14836-14843. https://doi.org/10.1021/am501351c
A combined chemical pressure and substrate biaxial pressure crystal engineering approach was demonstrated for producing highly epitaxial Sm-doped BiMnO_3 (BSMO) films on SrTiO_3 single crystal substrates, with enhanced magnetic transition temperatures, T_C up to as high as 140 K, 40 K higher than that for standard BiMnO_3 (BMO) films. Strong room temperature ferroelectricity with piezoresponse amplitude, d_33 = 10 pm/V, and long-term retention of polarization were also observed. Furthermore, the BSMO films were much easier to grow than pure BMO films, with excellent phase purity over a wide growth window. The work represents a very effective way to independently control strain in-plane and out-of-plane, which is important not just for BMO but for controlling the properties of many other strongly correlated oxides.
This research was funded by the Engineering and Physical Sciences Research Council, (EP/P50385X/1), the European Research Council (ERC-2009-AdG 247276 NOVOX). The TEM work at Texas A&M University was funded by the U.S. National Science Foundation (NSF-1007969).
European Research Council (247276)
External DOI: https://doi.org/10.1021/am501351c
This record's URL: https://www.repository.cam.ac.uk/handle/1810/245785
Attribution 2.0 UK: England & Wales, Creative Commons Attribution License 2.0 UK
Licence URL: http://creativecommons.org/licenses/by/2.0/uk/