Study of multiferroic properties of Bi_(2)Fe_(2)WO_(9) ceramic for devices application  

作　　者：Jyoshna Rout R.N.P.Choudhary 

机构地区：[1]Department of Physics,Institute of Technical Education&Research Siksha‘`O'Anusandhan University,Bhubaneswar 751030,Odisha,India

出　　处：《Journal of Advanced Dielectrics》2016年第3期64-71,共8页先进电介质学报（英文）

摘　　要：The Bi_(2)Fe_(2)WO_(9) ceramic was prepared using a standard solid-state reaction technique.Preliminary analysis of X-ray diffraction pattern revealed the formation of single-phase compound with orthorhombic crystal symmetry.The surface morphology of the material captured using scanning electron microscope(SEM)exhibits formation of a densely packed microstructure.Comprehensive study of dielectric properties showed two anomalies at 200℃and 450℃:first one may be related to magnetic whereas second one may be related to ferroelectric phase transition.The field dependent magnetic study of the material shows the existence of small remnant magnetization(M_(r))of 0.052 emμ/g at room temperature.The existence of magneto-electric(ME)coupling coefficient along with above properties confirms multi-ferroic characteristics of the compound.Selected range temperature and frequency dependent electrical parameters(impedance,modulus,conductivity)of the compound shows that electric properties are correlated to its microstructure.Detailed studies of frequency dependence of ac conductivity suggest that the material obeys Jonscher's universal power law.

关 键 词：X-ray diffraction MAGNETISM ferroelectric properties magneto-electric coupling IMPEDANCE MODULUS 

分 类 号：O17[理学—数学]