Tuning the ferroelectric transition and magnetic ordering by the polar Ba0.1Sr0.9TiO3 substitution in the multiferroic (1−x) Ba0.1Sr0.9TiO3 - xBiFeO3 (0.2 ≤ x ≤ 0.8) solid solution
Tuning the ferroelectric transition and magnetic ordering by the polar Ba0.1Sr0.9TiO3 substitution in the multiferroic (1−x) Ba0.1Sr0.9TiO3 - xBiFeO3 (0.2 ≤ x ≤ 0.8) solid solution
复制标题
DOI：
10.1016/j.jallcom.2018.02.012
复制
发表时间：
2018-05
影响因子：
6.2
通讯作者：
W. Huang;J. Yang;Yujun Qin;Duoyuan Wang;L. Yin;X. Tang;W. Song;P. Tong;Xuming Zhu;Y. Su
中科院分区：
文献类型：
--
作者：
W. Huang;J. Yang;Yujun Qin;Duoyuan Wang;L. Yin;X. Tang;W. Song;P. Tong;Xuming Zhu;Y. Su
化学取代是改变功能材料电性能和磁性能的有效方法。本文采用改进的Pechini法制备了（1-x）Ba0.1Sr0.9TiO3- xBiFeO3（0.2≤ x≤ 0.8）陶瓷。x射线衍射图表明，随着Ba0.1Sr0.9TiO3（BST）含量的增加，样品的结构逐渐由菱面体相转变为四方相。介电性能表明，BST的掺杂水平可以在885 K ~ 260 K范围内调制铁电，并伴随铁电从非弛豫型向弛豫型转变。富bifeo3样品具有室温铁电性、铁磁性和本征磁介电性。磁化和磁介电测量均表明，BST的加入破坏了自旋摆线，并且随着BST用量的增加，螺旋结构向反铁磁共线结构转变的临界场减小。这些发现表明，该材料在bfo基磁电器件和电热冷却技术方面具有很大的应用前景。
Chemical substitution is an effective method for tailoring the electrical and magnetic properties of functional materials. In this work, (1–x)Ba0.1Sr0.9TiO3- xBiFeO3(0.2≤ x≤ 0.8) ceramics were prepared by the modified Pechini method. X-ray diffraction patterns manifest that the samples undergo a gradual structural transformation from rhombohedral phase to tetragonal phase with increasing the content of Ba0.1Sr0.9TiO3(BST). Dielectric properties show thatTCcan be modulated by the doping level of BST in a wide range from 885 K to 260 K accompanied by the ferroelectric transformation from non-relaxor type to relaxor type ferroelectricity. The room temperature ferroelectricity, ferromagnetism and intrinsic magnetodielectric are observed in the BiFeO3-rich samples. Magnetization and magnetodielectric measurement both show that the spin cycloid is destroyed by the substitution of BST and the critical field for the transition from spiral to antiferromagnetic collinear magnetic structure decreases with increasing the amount of BST. These findings manifest that this materials are quite promising for potential applications in BFO-based magnetoelectric devices and electrocaloric cooling technologies.