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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 >Dynamic magnetic properties of ZnO nanocrystals incorporating Fe
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Dynamic magnetic properties of ZnO nanocrystals incorporating Fe

机译：掺Fe的ZnO纳米晶体的动态磁性能

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摘要

The aim of the present work is to study the magnetic properties of ZnO(Fe) nanocrystalline samples prepared by two methods of synthesis. We have used the microwave assisted hydrothermal synthesis and traditional wet chemistry method followed by calcination. The detailed structural characterization was performed by means of X-ray diffraction and micro-Raman spectroscopy measurements. The dynamic magnetic properties were studied by means of AC susceptibility χ. The measurements were performed at small AC magnetic field with amplitude not exceeding 5 Oe and different frequency values (from 7 Hz to 9970 Hz). The AC susceptibility maxima have been found for in-phase susceptibility Re(χ) and for out of phase susceptibility Im(χ). We analyzed the observed frequency dependence of the peak temperature in the AC susceptibility curve using the empirical parameter φ that is a quantitative measure of the frequency shift and is given by the relative shift of the peak temperature per decade shift in frequency, as well as Vogel-Fulcher law.
机译：本工作的目的是研究通过两种合成方法制备的ZnO（Fe）纳米晶样品的磁性。我们使用了微波辅助水热合成和传统的湿化学方法，然后进行了煅烧。详细的结构表征是通过X射线衍射和显微拉曼光谱法进行的。利用交流磁化率χ研究了动态磁性能。测量是在较小的交流磁场中进行的，振幅不超过5 Oe，频率值不同（从7 Hz到9970 Hz）。已发现同相磁化率Re（χ）和异相磁化率Im（χ）的AC磁化率最大值。我们使用经验参数φ分析了交流磁化率曲线中峰值温度的频率依赖性，该经验参数φ是频率偏移的定量度量，由峰值频率每十倍频移的峰值温度的相对偏移以及Vogel给出-福尔彻法则。

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