磁性液体光透射变化的场致开关效应  

Field-Induced On-Off Effect of Light Transmission Through Ferrofluids

作　　者：王安蓉[1] 白浪[1] 李建[1] 

机构地区：[1]西南大学物理科学与技术学院

出　　处：《西南大学学报（自然科学版）》2007年第11期61-65,共5页Journal of Southwest University(Natural Science Edition)

基　　金：重庆市自然科学基金资助项目(2005BB4106);西南师范大学发展基金资助项目(SWNUF2004005)

摘　　要：通过研究磁性液体在平行于激光照射方向具有不同梯度的外磁场作用下,其光透射率随时间的变化情况,进一步研究了其在平行于光方向磁场作用下的开关效应,并从理论上定性地分析了导致这种现象的内在因素,讨论了微粒链的形成以及链在磁性液体内部的微观运动情况.The intensity variation of light transmission through ionic ferrofluid under different gradient magnetic fields parallel to the light direction is investigated and the field-induced on-off effect of light transmission through ferrofluid is studied. The mechanisms underlying this phenomenon are quantitatively analyzed, and the process of the formation of the chain structure of magnetic nanoparticles and the movement of the microstructure in ferrofluid in an external magnetic field are discussed.

关 键 词：离子型磁性液体 梯度磁场 场致效应 

分 类 号：O361.3[理学—流体力学] O469[理学—力学]