由Ni_2O_3/Fe_2O_3复合纳米微粒构成的离子型磁性液体的磁化性质研究  

Research of Magnetic Properties of Ion Ferrofluid Consisting of Ni_2O_3/Fe_2O_3 Composite Nanoparticles

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作  者:赵正莹[1] 闵文静[1] 韩芍娜[1,2] 张清梅[1] 李建[1] 

机构地区:[1]西南大学物理科学与技术学院,重庆400715 [2]河南理工大学万方科技学院,郑州450000

出  处:《西南大学学报(自然科学版)》2010年第5期60-64,共5页Journal of Southwest University(Natural Science Edition)

基  金:西南大学本科生科技创新基金资助项目

摘  要:采用Massart法合成了Ni2O3/Fe2O3复合微粒磁性液体,并用振动样品磁强计(VSM)对磁性微粒及其磁性液体的磁化性质进行了测量.用Langevin理论进行了磁性液体磁化曲线的拟合.实验结果表明,磁性液体的实际测量的比饱和磁化强度小于理论值,并且磁性液体的初始磁化率大于Langevin理论曲线的初始磁化率.用零场下磁性液体中的微粒自组装结构对实验现象进行了解释.In a study reported in this paper,the method of Massart was employed to synthesize an Ni2O3/Fe2O3 composite nanoparticle ferrofluid,and VSM was used to measure the composite magnetic nanoparticle and its ferrofluid.The theory of Langevin was applied to fit the magnetic curve of the ferrofluid.The results indicated that the specific saturation magnetization measured in this study was lower than the theoretical value and the initial magnetic susceptibility was greater than that on the theoretical curve of Langevin.The phenomenon observed in this experiment was interpreted with the self-assembly structure of the particle in the ferrofluid under zero field.

关 键 词:Ni2O3/Fe2O3复合微粒 磁性液体 比饱和磁化强度 体积分数 

分 类 号:O482.5[理学—固体物理]

 

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