Magnetically modulated optical transmission of magnetic fluid films
Magnetically modulated optical transmission of magnetic fluid films
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DOI：
10.1016/s0304-8853(02)00629-7
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发表时间：
2002-11-01
影响因子：
2.7
通讯作者：
Hong, CY
中科院分区：
文献类型：
--
作者：
Horng, HE;Yang, SY;Hong, CY
通过测量垂直入射光在磁流体薄膜中的透射强度，研究了垂直磁场下磁流体薄膜的光透射特性。随着磁场强度H的增大，磁流体薄膜的透过率I/I-0减小，这是由于相对光学透明的液相所占面积减小所致。在一定的H值下，透射率随膜厚L的增加呈指数下降，即I/I-0 = exp（-L/delta），其中delta表示衰减距离。进一步发现，δ随磁场强度和流体浓度而变化，但与场的扫描速率无关。(C)2002 Elsevier Science B. V.保留所有权利。
The optical transmission of the magnetic fluid film under perpendicular magnetic fields was investigated by measuring the transmitted intensity of the normally incident light through the film. The transmittance I/I-0 of the magnetic fluid film was observed to decrease with the increase of the magnetic field strength H due to the reduction in the area occupied by the relatively optic transparent liquid phase. Moreover, under a given H, the transmittance decreased exponentially with the increasing film thickness L, i.e. I/I-0 = exp(-L/delta), where the delta denotes the attenuation distance. It was further found that the delta varies with the magnetic field strength and the concentration of the fluid, but is independent of the sweep rate of the field. (C) 2002 Elsevier Science B.V. All rights reserved.