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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Preparation and study of some physical properties of Co-Ni-Li ferrite/polypyrrole nanocomposites
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Preparation and study of some physical properties of Co-Ni-Li ferrite/polypyrrole nanocomposites

机译：Co-Ni-Li铁氧体/聚吡啉纳米复合材料的一些物理性质的制备与研究

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摘要

Co0.5Ni0.2Li0.15Fe2.15O4/PolYpyrrole (PPy) nanocomposite samples (PPy wt%: 10, 30, 50%) have been prepared by the mechano-synthesis method. Their structural and magnetic properties have been investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and the vibrating sample magnetometer (VSM). A linear decrease of saturation M-s, remnant M-r magnetization, and anisotropy constant K-1, along with an almost stable value of the coer-civity H-c have been found and explained as due to the increase of the non-magnetic PPy shell compared to the magnetic nanoparticles in the core. This also may have played a role in the enhancement of sigma(dc) values of the composite samples more than those of the pure PPy and ferrite samples. The frequency dependence of epsilon',epsilon '',sigma'(ac) and tan delta of the composite samples has been discussed depending on Maxwell -Wagner interfacial polarization. The (Z'-Z '') plots of the composite samples have shown different overlapping parts of semi-circles depending upon the electrical parameters. (C) 2019 Published by Elsevier B.V.
机译：通过机械合成方法制备了COO.5NI0.2LI0.15FE2.15O4 /聚吡咯（PPY）纳米复合材料（PPY WT％：10,30，50％）。通过X射线衍射（XRD），透射电子显微镜（TEM），傅里叶变换红外光谱（FT-IR）和振动样品磁力计（VSM）研究了它们的结构和磁性。已经发现饱和MS，残余MR磁化和各向异性常数K-1的线性减少，并且已经发现了与剪切菌率HC的几乎稳定的值，并且由于与非磁性PPY壳的增加而解释为芯中的磁性纳米颗粒。这也可能在复合样品的σ（DC）值的增强中起到多于纯PPY和铁氧体样品的增强作用。已经讨论了复合样品的ε'，ε'，sigma'（Ac）和Tan delta的频率依赖性，这取决于麦克斯韦尔界面界面极化。复合样品的（Z'-Z'）图已经示出了根据电参数的半圆的不同重叠部分。 （c）2019年由elestvier b.v发布。

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