Article ID Journal Published Year Pages File Type
8032962 Thin Solid Films 2018 17 Pages PDF
Abstract
We investigated the local ferroelectric polarization switching characteristics of an epitaxial (001) BiFeO3 (BFO) thin film and BFO nanodots having 100-300-nm diameters. The 30-nm-thick BFO thin films were deposited on (100) Nb-doped SrTiO3 (Nb:STO) substrates via pulsed laser deposition. This large switching voltage of the BFO thin film originates from the neighboring domains that stabilize the ferroelectric polarization nanobit against the switching electric field induced by the external bias. The coercive voltages of the piezoelectric d33 hysteresis loops, which depend on the diameters of the BFO nanodots, were saturated to that of the BFO thin film, indicating that the influence of the neighboring domains is limited to within a diameter of approximately 300 nm.
Related Topics
Physical Sciences and Engineering Materials Science Nanotechnology
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