论文标题
频率诱导的环氧/磁铁矿纳米复合材料中的负磁敏感性
Frequency-induced Negative Magnetic Susceptibility in Epoxy/Magnetite Nanocomposites
论文作者
论文摘要
环氧树脂/磁铁矿纳米复合材料在静态或低频电磁场下表达超帕磁性。 X波段说，在微波频率下，纳米复合材料揭示了意外的Diamagnetism。为了解释有趣的现象，我们通过记忆效应重新审视了Debye放松定律。磁铁矿的磁化载体无法与快速变化的磁场同步，并且有助于磁磁性，这是纳米颗粒的负磁敏感性。刚刚开发的模型，拟合结果不仅可以用来解释X波段中的实验数据，而且还可以用来估计磁磁性和Diamagnetism之间的过渡频率。
The epoxy/magnetite nanocomposites express superparamagnetism under a static or low-frequency electromagnetic field. At the microwave frequency, said the X-band, the nanocomposites reveal an unexpected diamagnetism. To explain the intriguing phenomenon, we revisit the Debye relaxation law with the memory effect. The magnetization vector of the magnetite is unable to synchronize with the rapidly changing magnetic field, and it contributes to diamagnetism, a negative magnetic susceptibility for nanoparticles. The model just developed and the fitting result can not only be used to explain the experimental data in the X-band but also can be used to estimate the transition frequency between paramagnetism and diamagnetism.
