Enhanced magnetic and magnetoelectric properties of Mn doped multiferroic ceramics

被引:52
作者
Dhanalakshmi, B. [1 ]
Kollu, Pratap [2 ,3 ]
Sekhar, B. Chandra [4 ]
Rao, B. Parvatheeswara [5 ]
Rao, P. S. V. Subba [5 ]
机构
[1] Vignans Inst Informat Technol, Visakhapatnam 530049, Andhra Pradesh, India
[2] Univ Hyderabad, Sch Phys, CASEST, Hyderabad 500046, Andhra Pradesh, India
[3] Univ Cambridge, Cavendish Lab, Thin Film Magnetism Grp, Royal Soc London, Cambridge CB3 0HE, England
[4] Vignans Inst Engn Women, Visakhapatnam 530046, Andhra Pradesh, India
[5] Andhra Univ, Dept Phys, Visakhapatnam 530003, Andhra Pradesh, India
关键词
Multiferroics; Sol-gel autocombustion; Rietveld analysis; Magnetic hysteresis loops; Magnetoelectric coupling; BIFEO3;
D O I
10.1016/j.ceramint.2017.04.085
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Single phase multiferroics of BiFeO3 (BFO) and Mn doped Bi0.93Mn0.03FeO3 (BMFO), and composite multiferroic systems of BiFeO3-Ni0.5Zn0.5Fe2O4 (BFO-NZFO) and Mn doped Bi0.95Mn0.05FeO3-Ni0.5Zn0.5Fe2O4 (BMFO-NZFO) have been prepared by using sol-gel autocombustion and solid state methods. Rietveld analysis on the BFO and BMFO samples reveals rhombohedrally distorted single phase R3c perovskite structures while that of the multi-phase composites exhibit both spinel (for the NZFO) and perovskite phases. Scanning electron micrographs of the samples show uniformly dispersed fine grained microstructures with indications of decreased grain size for the Mn doped samples. Polarization-electric field hysteresis (P-E) loops on the samples exhibit spontaneous ferroelectric polarizations with specific enhancements in the remnant polarization by the Mn doping either in the single phase BMFO or in the multi-phase BMFO-NZFO composite. Room temperature magnetic hysteresis (M-H) loop measurements on the samples indicate that the doping of Mn in bismuth sites in the BFO has produced a considerable improvement in the magnetization, and the Mn doped BMFO-NZFO composite has shown further improvement in its value compared to that of the undoped BFO-NZFO composite. Thus, it can be inferred from the above that the Mn doping in single phase/composite BiFeO3 based multiferroic ceramics is capable of enhancing both the ferroelectric and ferromagnetic properties and thereby the magnetoelectric (M-E) coupling as evident from the obtained M-E curves.
引用
收藏
页码:9272 / 9275
页数:4
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