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Structure, ferroelectric and magnetic characteristics of SmFeO 3 and BaTiO 3 co-modified BiFeO 3 ceramics
Journal of Materials Science: Materials in Electronics ( IF 2.8 ) Pub Date : 2020-01-20 , DOI: 10.1007/s10854-020-02895-w
Juan Liu , Miaomiao Niu , Lejiang Wang , Guorong Chen , Dong Xu

Abstract

BiFeO3 is the most important single-phase room temperature multiferroic materials. In this work, the structure, ferroelectric and magnetic properties of ternary SmFeO3 and BaTiO3 co-substituted BiFeO3 ceramics prepared by standard solid-state reaction method were investigated. The phase composition and structural transformation were characterized by X-ray diffraction and Raman spectrum analysis. The substitution of BaTiO3 leads to the phase transformation from rhombohedral R3c to pseudocubic, and the pseudocubic phase is obtained at BF008-017 ceramic. Meanwhile, the orthorhombic Pbnm phase content gradually increases with the addition of SmFeO3. According to differential scanning calorimetry (DSC) analysis results, the magnetic transition temperature TN decreases linearly with increasing B-site substitution content. The P–E hysteresis loops measured with Positive-Up-Negative-Down (PUND) method showed the enhanced ferroelectricity at BF008-01, and the maximum piezoelectric coefficient d33 obtained was 17.3 pC/N. The magnetic properties were significantly enhanced, and the best magnetic properties were achieved at BF017-008 sample, where the maximum magnetization ~ Mmax = 0.99 emu/g and remnant magnetization ~ Mr = 0.44 emu/g. The origin of the enhanced magnetism of BiFeO3-based ceramics is complex, and the substitutions of A and B sites would affect magnetic properties.



中文翻译:

SmFeO 3和BaTiO 3共改性的BiFeO 3陶瓷的结构,铁电和磁特性

摘要

BiFeO 3是最重要的单相室温多铁材料。在这项工作中,研究了通过标准固态反应方法制备的三元SmFeO 3和BaTiO 3共取代的BiFeO 3陶瓷的结构,铁电和磁性。通过X射线衍射和拉曼光谱分析来表征相组成和结构转变。BaTiO 3的取代导致从菱形R3c到伪立方的相变,伪立方相在BF008-017陶瓷上获得。同时,随着SmFeO 3的添加,正交晶Pbnm相含量逐渐增加。根据差示扫描量热法(DSC)分析结果,磁转变温度T N随着B位取代含量的增加而线性降低。该P-E磁滞回线与正-UP-负向下(PUND)法测量表明增强的铁电性在BF008-01,并且压电系数的最大d 33制得17.3 PC / N。BF017-008样品的磁性能得到了显着增强,并获得了最佳的磁性能,最大磁化强度〜M max  = 0.99 emu / g,剩余磁化强度〜M r  = 0.44 emu / g。BiFeO 3增强磁性的起源基陶瓷很复杂,A和B位的取代会影响磁性能。

更新日期:2020-01-21
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