Electromechanical control of polarization vortex ordering in an interacting ferroelectric-dielectric composite dimer
arXiv:1901.11433 · doi:10.1063/1.5046080
Abstract
Using a free-energy based computational model, we have investigated the response of a system comprising two interacting ferroelectric nanospheres, embedded in a dielectric medium, to a static external electric field. The system response is hysteretic and tunable by changing the inter-particle distance and the orientation of the applied field, which strongly modulates the field-driven long-range elastic interactions between the particles that propagate through the dielectric matrix. At small separations, the sensitivity of the system behavior with respect to the electric field direction originates from drastically different configurations of the local vortex-like polarization states in ferroelectric particles. This suggests new routes for the design of composite metamaterials whose dielectric properties can be controlled and tuned by selecting the mutual arrangement of their ferroelectric components.
arXiv commentSupplemental published on AIP server https://aip.scitation.org/doi/suppl/10.1063/1.5046080/suppl_file/mangeri_heinonen_supplemental_electromechanical_control.pdf
References in corpus (7)
- High density array of epitaxial BiFeO3 nanodots with robust and reversibly switchable topological domain states
- Unusual polarization patterns in flat epitaxial ferroelectric nanoparticles
- Topological phase transformations and intrinsic size effects in ferroelectric nanoparticles
- Superparaelectric phase in the ensemble of non-interacting ferroelectric nanoparticles
- Multidomain switching in the ferroelectric nanodots
- Polar State in Freestanding Strontium Titanate Nanoparticles
- Size-Dependent Structural Phase Transitions in SrTiO3 Nanoparticles