Deterministic Switching in Bismuth Ferrite Nanoislands
journal contributionposted on 25.07.2016 by Alessio Morelli, Florian Johann, Stuart R. Burns, Alan Douglas, J. Marty Gregg
Any type of content formally published in an academic journal, usually following a peer-review process.
We report deterministic selection of polarization variant in bismuth BiFeO3 nanoislands via a two-step scanning probe microscopy procedure. The polarization orientation in a nanoisland is toggled to the desired variant after a reset operation by scanning a conductive atomic force probe in contact over the surface while a bias is applied. The final polarization variant is determined by the direction of the inhomogeneous in-plane trailing field associated with the moving probe tip. This work provides the framework for better control of switching in rhombohedral ferroelectrics and for a deeper understanding of exchange coupling in multiferroic nanoscale heterostructures toward the realization of magnetoelectric devices.