Structural, magnetic behaviors and temperature-dependent Raman scattering spectra of Y and Zr codoped BiFeO3 ceramics
Structural, magnetic behaviors and temperature-dependent Raman scattering spectra of Y and Zr codoped BiFeO3 ceramics
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DOI：
10.1142/s2010135x15500253
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发表时间：
2015-10
影响因子：
3.1
通讯作者：
Cheng Zhang;D. Xie;Jianlong Xu;Yilin Sun;Yongyuan Zang;Xiaowen Zhang;Xingsen Gao
中科院分区：
文献类型：
--
作者：
Cheng Zhang;D. Xie;Jianlong Xu;Yilin Sun;Yongyuan Zang;Xiaowen Zhang;Xingsen Gao
制备了复铁性BiFeO_3(BFO)和Y、Zr共掺杂的BFO(Bi1-xYxFe0.95Zr0.05O3)陶瓷，研究了共掺杂对其晶体结构和磁性能的影响。X射线衍射和拉曼模的演化证实，共掺杂使块体BFO陶瓷的晶体结构由三方转变为四方。磁行为的增强表现为空间调制螺旋自旋结构的破坏，这可以归因于晶体结构的变化和尺寸效应。同时，300~800K的拉曼光谱表明，低频声子模在Neel温度附近有快速软化现象。
Multiferroic BiFeO3 (BFO) and Y, Zr codoped BFO (Bi1-xYxFe0.95Zr0.05O3) ceramics were prepared and the influence of codoping on the crystal structure and magnetic properties were investigated in this work. Confirmed by the evolution of X-ray diffraction and Raman modes, the codoping has changed the crystal structure from rhombohedral to tetragonal in bulk BFO ceramics. The enhancement of magnetic behaviors is demonstrated by the damage of space-modulated spiral spin structure, and it can be attributed to the crystal structure change and size effects. Meanwhile, Raman spectra from 300 to 800 K demonstrates that lower frequency phonon modes show rapid softening near the Neel temperature.