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Conduction mechanisms in carbon matrix containing ferromagnetic nanoparticles

机译:含铁磁性纳米粒子的碳基体中的传导机理

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We have investigated the low-temperature resistance and magnetoresi stance (MR) behavior of the carbon matrix containing ferromagnetic nanoparticles. A range of compositions with different levels of disorder and varying iron content were prepared from the pyrolysis of organic precursor maleic anhydride and ferrocene. The temperature dependence of resistivity shows a negative temperature coefficient in the entire measurement range of 1.3-300 K. An increase in conductivity with the external magnetic field and a characteristic upturn at low temperature, is seen in all the compositions. The zero-field conductivity and the MR can be explained with in the framework of two-dimensional electron-electron interaction model and the Kondo-like behavior. (c) 2006 Elsevier B.V. All rights reserved.
机译:我们已经研究了包含铁磁性纳米粒子的碳基质的低温电阻和磁阻(MR)行为。由有机前体马来酸酐和二茂铁的热解制备了具有不同无序水平和不同铁含量的一系列组合物。电阻率的温度依赖性在整个1.3-300 K的测量范围内均显示负温度系数。在所有组合物中均可见到电导率随外部磁场的增加以及在低温下的特征性上翘。零场电导率和磁阻可以在二维电子-电子相互作用模型和类似近藤行为的框架内解释。 (c)2006 Elsevier B.V.保留所有权利。

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