Abstract
(1-x)BiFeO3-xBa0.7Ca0.3TiO3 ((1-x)BF-xBCT) multiferroic ceramics with compositions (0.20 ≤ x ≤ 0.30) have been prepared by conventional solid-state method. Here we report an experimental study of the local structure by applying total elastic scattering and Raman analyses to an important ferroelectric solid solution exhibiting a morphotropic phase boundary (MPB) in this range, induced by composition, where important enhancement of physical properties have been detected. BCT effects doping on structures, electric, as well as magnetic properties have been intensively investigated. Rietveld refinement and Raman scattering analyses suggest an increase of the oxygen octahedra rotation for x ≤ 0.275. Both remnant polarization and hysteresis loop squareness of (1-x)BF-xBCT ceramics are improved obviously after substitution, especially near MPB. Remnant magnetization and polarization property of (1-x)BF-xBCT are enhanced substantially at the R3c phase region. Magnetization enhancement is attributed to the augment of Dzyaloshinsky-Moriya interaction. These results show that Ba0.7Ca0.3TiO3 doped BiFeO3 is a promising multiferroic material.
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