Electromechanical-mnemonic effects in BiFeO3 for electric field history dependent crystallographic phase patterning

S.M. Neumayer, N. Browne, A.B. Naden, D. Edwards, D. Mazumdar, N. Bassiri-Gharb, Amit Kumar, B.J. Rodriguez

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
253 Downloads (Pure)


Strained bismuth ferrite thin films unite a wealth of functional properties including ferroelectricity, ferromagnetism, electrooptic coupling and interface-mediated conductivity. The coexistence of rhombohedral (R) and tetragonal (T) phases in these films further contributes to their versatility, as structural transitions can modify functional behaviour and be leveraged to engineer properties such as electrochromism, magnetic characteristics, electromechanical response and charge transport. However, potential device applications necessitate precise control of the location and size of R and T phases and associated microstructures. Here, distinct R/T phase patterns of different spatial expanse are obtained by appropriately pre-poling the film by applying an electric field with an atomic force microscope tip during scanning, which also leads to initially uniform T phases as well as through local application of a certain sequence of voltage pulses. Moreover, the impact of field history on ferroelectric characteristics is investigated, providing further opportunities to tailor functional behavior
Original languageEnglish
Pages (from-to)10231–10239
JournalJournal of Materials Science
Issue number14
Early online date13 Apr 2018
Publication statusPublished - Jul 2018


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