CuFe_2O_4纳米微粒及其自形成磁性液体的磁性研究  

The Magnetic Study of CuFe_2O_4 Nanoparticles and CuFe_2O_4 Self-Formed Ferrofluids

作　　者：陈娴敏[1] 李建[1] 白浪[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）》2007年第7期38-43,共6页Journal of Southwest University(Natural Science Edition)

基　　金：重庆市自然科学基金(CSTC2005BB4106);西南师范大学发展基金(SWNUF2004005).

摘　　要：对用其沉淀法制备的CuFe_2O_4磁性纳米微粒及其合成的自形成磁性液体在室温下进行磁性测量.其结果表明CuFe_2O_4微粒的饱和磁化强度较小,粉末与自形成磁性液体均呈超顺磁性-无剩磁、无矫顽力.用Langevin理论对测得的磁性进行了对比分析,从微粒间的相互作用解释了粉末和磁性液体的实测磁化曲线与Langevin理论的不同偏离现象.The magnetic behavior of CuFe2O4 nanoparticles prepared by co-precipitation and their selfformed ferrofluids is measured at room temperature. The results show that the saturation magnetization of CuFe2O4 powder is less than that of other ferrite nanoparticles and that both the powder and the ferrofluids exhibit superparamagnetism. The experimental results are analyzed with Langevin theory, and the differences in behavior of deviation from Langevin theory for the powder and the ferrofluids are explained with interaction between particles.

关 键 词：纳米微粒 磁性液体 超顺磁性 Langevin理论 

分 类 号：TM277[一般工业技术—材料科学与工程]