Institute of Electronics and Information Technology, Lublin University of Technology, Nadbystrzycka 38a Str., 20-618, Lublin, Poland.
Institute of Technology and Mechatronics, University of Silesia, Żytnia 12 Str., 41-200, Sosnowiec, Poland.
Nanoscale Res Lett. 2016 Dec;11(1):234. doi: 10.1186/s11671-016-1436-3. Epub 2016 Apr 30.
Solid-state sintering method was used to prepare ceramic materials based on bismuth ferrite, i.e., (BiFeO3)1 - x -(BaTiO3) x and Bi1 - x Nd x FeO3 solid solutions and the Aurivillius Bi5Ti3FeO15 compound. The structure of the materials was examined using X-ray diffraction, and the Rietveld method was applied to phase analysis and structure refinement. Magnetoelectric coupling was registered in all the materials using dynamic lock-in technique. The highest value of magnetoelectric coupling coefficient α ME was obtained for the Bi5Ti3FeO15 compound (α ME ~ 10 mVcm(-1) Oe(-1)). In the case of (BiFeO3)1 - x -(BaTiO3) x and Bi1 - x Nd x FeO3 solid solutions, the maximum α ME is of the order of 1 and 2.7 mVcm(-1) Oe(-1), respectively. The magnitude of magnetoelectric coupling is accompanied with structural transformation in the studied solid solutions. The relatively high magnetoelectric effect in the Aurivillius Bi5Ti3FeO15 compound is surprising, especially since the material is paramagnetic at room temperature. When the materials were subjected to a preliminary electrical poling, the magnitude of the magnetoelectric coupling increased 2-3 times.
采用固态烧结法制备了基于铋铁氧体的陶瓷材料，即（BiFeO3）1-x-（BaTiO3）x 和 Bi1-xNdxFeO3 固溶体和 Aurivillius 化合物 Bi5Ti3FeO15。采用 X 射线衍射对材料的结构进行了检查，并应用 Rietveld 法进行了相分析和结构精修。采用动态锁相技术在所有材料中记录了磁电耦合。在 Bi5Ti3FeO15 化合物中获得了最高的磁电耦合系数αME（αME~10 mVcm-1Oe-1）。对于（BiFeO3）1-x-（BaTiO3）x 和 Bi1-xNdxFeO3 固溶体，最大αME 的量级分别约为 1 和 2.7 mVcm-1Oe-1。在所研究的固溶体中，磁电耦合的大小伴随着结构转变。在 Aurivillius Bi5Ti3FeO15 化合物中出现的相对较高的磁电效应令人惊讶，尤其是因为该材料在室温下呈顺磁性。当材料经过初步的电极化处理后，磁电耦合的强度增加了 2-3 倍。
