Daisuke Kan, Lucia Pálová, Varatharajan Anbusathaiah, Ching Jung Cheng, Shigehiro Fujino, Valanoor Nagarajan, Karin M. Rabe and Ichiro Takeuchi Universal Behavior and Electric-Field-Induced Structural Transition in Rare-Earth-Substituted BiFeO3 Advanced Functional Materials 20
A universal behavior in rare-earth-substituted BiFeO3 has been discovered. The property-enhancing morphotropic phase boundary can be achieved by controlling the average A-site ionic radius. An electric-field-induced transformation from a paraelectric orthorhombic phase to the polar rhombohedral phase is proposed as the origin of the observed double hysteresis loop and the concomitant enhancement in the piezoelectric coefficient at the boundary.
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