磁性液体复合体在外磁场中的赝双折射效应和二向色性

Pseudo-birefringence and dichroism of ferrofluid composites in applied magnetic field

研究了由非磁性聚苯乙烯颗粒弥散于煤油基Fe_3O_4磁性液体中制备而成的磁性液体复合体.该复合体双折射效应和线二向色性随外磁场变化.在相同的磁场条件下,复合体的双折射效应较纯磁性液体有减弱而二向色性较后者有所增强.文中采用一简化模型对结果给出了解释.

Ferrofluid composites consist of non-magnetic polystyene particles dispersed in a kerosence-based ferrofluid. Their birefringence and dichroism in applied magnetic field were measured. In experiments it was found that under the condition of the same magnetic field, 1) the birefringence of ferrofluid composites is smaller than that of pure ferrofluid; 2) the linear dichroism of the composite samples is stronger than that of the pure ones. With a simple theoretical model, the results are explained.