The modified magnetodielectric response in KNN-CZFMO based particulate multiferroic composite system
作者机构：Department of PhysicsPunjabi UniversityPatiala 147002India Applied Sciences DepartmentPunjab Engineering College(Deemed to be University)Chandigarh 160012India
出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)
年 卷 期：2020年第10卷第5期
页 面：58-68页
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
主 题：Multiferroics composites magnetodielectric effect
摘 要：Lead-free multiferroic composites of 1−x(K_(0.5)Na_(0.5)NbO_(3−x))(Co_(0.6)Zn_(0.4))(Fe_(1.7)Mn_(0.3))O_(4)(KNN-CZFMO),where x=0.0,0.1,0.2,0.3,0.4,0.5 and 1.0,have been investigated for their structural,morphological,electrical,magnetic,dielectric and magneto-dielectric *** of KNN and CZFMO crystal structure in each composite has been confirmed from X-ray diffrac-tion analysis(XRD).Cuboidal-shaped grains of KNN and spherical-shaped grains of CZFMO have been observed by scanning electron microscopy(SEM).The room temperature ferroelectric behavior as confirmed by polarization versus electric field(P-E)hysteresis loops has been found to be decreasing with increasing CZFMO *** magnetic ordering with the increase in CZFMO concentration in the prepared composites has been observed by magnetization versus magnetic field(M-H)hysteresis *** electrical conductivity of composites has been studied using Jonscher’s universal power *** room temperature dielectric constant(ε′)and dielectric loss(tanδ)have been observed to decrease with the increase in the frequency of the applied external electric *** dielectric relaxation behavior has been observed using curve fitting analysis via the Havriliak-Negami relaxation *** value of the magnetodielectric(MD)effect~−11%at a frequency of 1 kHz with the applied magnetic field of 1 T has been achieved for 0.9 KNN−0.1 CZFMO(x=0.1)composite in the present research work.
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