Origin of Magnetically Induced Optical Transmission of Magnetic Nanocomposite Films.
Origin of Magnetically Induced Optical Transmission of Magnetic Nanocomposite Films.
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磁性纳米复合薄膜磁致光传输的起源
DOI：
10.3390/polym12112533
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发表时间：
2020-10-29
期刊：
影响因子：
5
通讯作者：
Chu M
中科院分区：
文献类型：
--
作者：
Zhang Q;Peng B;Xu J;Chu M
在此，我们提出了一个由聚二甲基硅氧烷和磁性纳米填料组成的复合膜的磁致光传输的起源通过实验和模拟的调查。结构化和非结构化的薄膜被用于研究，这是制造和没有磁场，分别。改变光学透射率观察到从这两种类型的薄膜时，他们受到外部磁场。通过数值分析，研究了磁场作用下粒子运动和薄膜磁致伸缩对薄膜光学透过率的影响。模拟结果表明，磁场作用下薄膜透射率的变化主要是由于薄膜磁致伸缩引起的薄膜厚度的变化。椭圆偏振分析结果证实了薄膜厚度随外加磁场的变化，薄膜磁致伸缩应力的测量证实了磁性复合薄膜中存在磁致伸缩。此外，还指出在一定条件下，磁致光透射率与薄膜磁致伸缩应力之间可能存在一定的关系。
Herein, we present an investigation on the origin of the magnetically induced optical transmission of composite films comprised of polydimethylsiloxane and magnetic nanofillers via experiment and simulation. Structured and unstructured films were used in the study, which were fabricated with and without magnetic fields, respectively. Altered optical transmittance was observed from both types of films when they were subjected to an external magnetic field. Numerical analyses were performed to investigate the effect of the particle movement under magnetic field and the film magnetostriction on the film optical transmittance. The simulation results show that the changed light transmission under magnetic field is mainly due to a variation in the film thickness resulting from the film magnetostriction. The ellipsometric analysis results confirm the altered film thickness in response to the external magnetic field, and the measurements of the film magnetostrictive stresses validate that there is magnetostriction in the magnetic composite films. Additionally, it is indicated that there might be some relationship between the magnetically induced optical transmission and the film magnetostrictive stress under certain conditions.
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