Room temperature multiferrocity and magnetodielectric properties of ternary (1-x) (0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-xBiFeO3 (0 ≤x≤ 0.9) solid solutions
Room temperature multiferrocity and magnetodielectric properties of ternary (1-x) (0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-xBiFeO3 (0 ≤x≤ 0.9) solid solutions
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DOI：
10.1063/1.4986360
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发表时间：
2017-09
影响因子：
4
通讯作者：
Wenjun Huang;J. Yang;Yongliang Qin;P. Xiong;Duoyuan Wang;L. Yin;X. Tang;W. Song;P. Tong-P.-Ton
中科院分区：
文献类型：
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作者：
Wenjun Huang;J. Yang;Yongliang Qin;P. Xiong;Duoyuan Wang;L. Yin;X. Tang;W. Song;P. Tong-P.-Ton
采用改进的Pechini法制备了（1-x）（0.94Bi0.5Na0.5TiO3-0.06BaTiO3）-xBiFeO 3（0 ≤x≤ 0.9）三元陶瓷。X射线衍射分析表明，随着BiFeO 3含量的增加，样品经历了从菱方-四方准同型相界到菱方相的结构转变。在x ≥ 0.6的富BiFeO 3样品中观察到室温铁磁性，这种铁磁性可以归因于反铁磁有序自旋的倾斜抑制了螺旋自旋结构。正上负下测试表明，在x = 0.6-0.8范围内，富BiFeO_3的样品表现出良好的上级铁电性能，最大剩余极化强度为44.7 μC/cm ~ 2。室温铁磁性和铁电性的共存表明，无铅BiFeO 3基固溶体是一种很有前途的多铁性材料，可能对潜在的铁电材料有重要意义。
(1–x)(0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-xBiFeO3 (0 ≤x≤ 0.9) ternary ceramics were prepared by the modified Pechini method. X ray diffraction patterns manifest that the samples undergo a gradual structural transformation from the rhombohedral-tetragonal morphotropic phase boundary to the rhombohedral phase with the increasing content of BiFeO3. Room temperature ferromagnetism was observed in BiFeO3-rich samples with x ≥ 0.6, and this ferromagnetism can be ascribed to the suppression of the spiral spin structure with the canting of antiferromagnetically ordered spins. The BiFeO3-rich samples (x = 0.6–0.8) exhibit superior ferroelectric properties with the maximum remanent polarization of 44.7 μC/cm2, as confirmed by the positive-up negative-down measurement to exclude the contribution of leakage current. The coexistence of room-temperature ferromagnetism and ferroelectricity manifests that the lead-free BiFeO3-based solid solutions are quite promising multiferroic materials and may be important for potential a...