期刊
MATERIALS CHEMISTRY AND PHYSICS
卷 134, 期 1, 页码 407-411出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2012.03.009
关键词
Magnetic materials; Chemical synthesis; Microstructure; Magnetic properties
资金
- National Natural Science Foundation of PR China [11074205]
B.VIonic ferrofluids based on gamma-Fe2O3/Ni2O3 composite nanoparticles are a polydispersed system prepared by the Massart method. The magnetization and optical relaxation behaviors of these ferrofluids show that, in addition to the ring-free micelle aggregates, there are also chainlike aggregates in the ferrofluids. The chainlike aggregation is attributed to so-called depletion force in the polydispersed ferrofluids because magnetic interaction between the ferrofluid particles is so weak that these particles cannot form the aggregates just by the magnetic interaction. For the gamma-Fe2O3/Ni2O3 ionic ferrofluids, the depletion force stimulates the larger ferrofluid particles, forming short chains in the absence of a magnetic field and their macroscopic properties, e.g., magnetization and optical relaxation, all result from the short chains. Ferrofluids having chainlike aggregates alone could have excellent magneto-optical effects. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据