CoFe_2O_4p-NiFe_2O_4二元离子型磁性液体的制备及其场致光透射驰豫  

Preparation of Binary-Ion CoFe_2O_4-p-NiFe_2O_4 Ferrofluids and Investigation of Field-Induced Relaxation of Light Transmitted Through Ferrofluids Film

作　　者：韩芍娜[1] 李建[1] 高荣礼[1] 李强[1] 陈娴敏[1] 

机构地区：[1]西南大学物理科学与技术学院,重庆400715

出　　处：《西南大学学报（自然科学版）》2008年第7期27-32,共6页Journal of Southwest University(Natural Science Edition)

基　　金：重庆市自然科学基金资助课题项目(CSTC2007BA3031)

摘　　要：介绍了CoFe2O4p-NiFe2O4二元离子型磁性液体的制备方法,用X射线衍射仪、透射电子显微镜、振动样品磁强计分别对NiFe2O4微粒前驱体(p-NiFe2O4)和CoFe2O4微粒的结构、粒径和磁性进行了测量与分析.研究了CoFe2O4p-NiFe2O4二元离子型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的场致透光的驰豫时间,并从微观结构上分析了产生驰豫时间差异的原因.The preparation of binary-ion CoFe2O4-P-NiFe2O4 ferrofluids is described. The structure, size and magnetism of P-NiFe2O4 （the NiFe2O4 particulate precursor） and CoFe2O4 particles are measured and analyzed. The transmission relaxation time of light through binary-ion CoFe2O4-p-NiFe2O4 ferrofluids as well as CoFe2O4 ferrofluids under different magnetic fields parallel to the light direction is measured. The difference in relaxation time between the binary ferrofluids and the CoFe2O4 ferrofluids is interpreted from the microstructure of the ferrofluids.

关 键 词：磁性液体 梯度磁场 光透射率 驰豫时间 

分 类 号：O482.53[理学—固体物理]