Magnetic, dielectric and magnetoelectric properties in (1 − x)Pb(Zr0.52Ti0.48)O3 + (x)CoFe2O4 composites
Magnetic, dielectric and magnetoelectric properties in (1 − x)Pb(Zr0.52Ti0.48)O3 + (x)CoFe2O4 composites
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DOI：
10.1007/s10854-015-3418-0
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发表时间：
2015-07
期刊：
影响因子：
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通讯作者：
M. Atif;M. Nadeem;R. Grössinger;R. S. Turtelli;F. Kubel
中科院分区：
文献类型：
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作者：
M. Atif;M. Nadeem;R. Grössinger;R. S. Turtelli;F. Kubel
采用球磨法合成了（1 − x）PbZr0.52Ti0.48O3+（x）CoFe2O4（x = 0.0，0.15，0.30，0.45和1.0）多铁性复合材料。Rietveld细化的XRD图谱证实了x = 0.0和x = 1.0时的单相形成以及x = 0.15、0.30和0.45时的两种不同相形成。SEM图像探讨了CFO含量对制备的复合材料中各相的晶粒连通性的影响。介电性能表现出介电色散随着频率的增加，由于界面极化，而被发现的介电常数随着CFO含量的增加，这是由于空间电荷效应。交流电导率分析表明，混合极化子跳跃型导电机制。磁滞回线表现出铁磁性的行为，表明在所制备的复合材料中存在有序的磁性结构。此外，随着CFO含量的增加，饱和磁化强度，磁致伸缩和应变灵敏度被发现增加，这反过来又有一个显着的磁电系数的影响。当x = 0.30时，复合材料的磁电系数最大，为1.45 mV cm−1Oe− 1。这里，所观察到的磁电系数的变化与微观结构以及CFO含量的量相关。
Multiferroic composites of (1 − x)PbZr0.52Ti0.48O3+ (x)CoFe2O4with x = 0.0, 0.15, 0.30, 0.45 and 1.0 are synthesized by using ball milling method. Rietveld refinement of XRD patterns confirmed the single phase formation in x = 0.0 and x = 1.0 and two distinct phase formation in x = 0.15, 0.30 and 0.45 composites. SEM images explored the effect of CFO content on the grain connectivity of each phase in the prepared composites. The dielectric properties showed dielectric dispersion with increasing frequency due to interfacial polarization; whereas the dielectric constant is found to increase with increasing CFO content which is attributed to the space charge effect. AC conductivity analysis suggested the mixed polaron hopping type of conduction mechanism. Magnetic hysteresis loops exhibited ferromagnetic like behaviour, indicating the presence of ordered magnetic structure in the prepared composites. Furthermore, with increasing CFO content, the saturation magnetization, magnetostriction and strain sensitivity is found to be increased which in turn have a significant effect on the magnetoelectric coefficient. The maximum magnetoelectric coefficient of 1.45 mV cm−1Oe−1is obtained for x = 0.30 composite. Here, the observed variation in the magnetoelectric coefficient is correlated with the microstructure as well as the amount of CFO content.