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|Title:||Suppression of mixed-phase areas in highly elongated BiFeO 3 thin films on NdAlO 3 substrates||Authors:||Woo, C.-S.
|Issue Date:||13-Aug-2012||Citation:||Woo, C.-S., Lee, J.H., Chu, K., Jang, B.-K., Kim, Y.-B., Koo, T.Y., Yang, P., Qi, Y., Chen, Z., Chen, L., Choi, H.C., Shim, J.H., Yang, C.-H. (2012-08-13). Suppression of mixed-phase areas in highly elongated BiFeO 3 thin films on NdAlO 3 substrates. Physical Review B - Condensed Matter and Materials Physics 86 (5) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevB.86.054417||Abstract:||Mixed-phase areas are produced in highly elongated BiFeO 3 (BFO) thin films as a consequence of strain relaxation. A (001) neodymium aluminate (NdAlO 3; NAO) substrate (a∼3.747 Å) prominently suppresses the strain relaxation effect and prevents the formation of mixed-phase regions. This creates a pathway to the thick, quasipure, highly elongated phases required for magnetoelectric applications. We characterize the crystal structure, the interface between film and substrate, the surface morphology, and the ferroelectric domain structure of BFO films on NAO substrates and compare them with those of films on typical lanthanum aluminate substrates. The underlying mechanisms are discussed based on the intriguing nature of phase competition in bismuth ferrite phases using first principles density functional calculations for the misfit strain-dependent total energy. © 2012 American Physical Society.||Source Title:||Physical Review B - Condensed Matter and Materials Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/117169||ISSN:||10980121||DOI:||10.1103/PhysRevB.86.054417|
|Appears in Collections:||Staff Publications|
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