Dynamics of field-induced ordering processes in ferrofluids studied by polarised small-angle neutron scattering

被引：12
|
作者：
Wiedenmann, A.
Keiderling, U.
May, R. P.
Dewhurst, C.
机构：
[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany
[2] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France
来源：
PHYSICA B-CONDENSED MATTER | 2006年 / 385卷
关键词：
polarised neutrons; small-angle scattering; ferrofluids; field-induced ordering; time-dependent stroboscopic measurements;
D O I：
10.1016/j.physb.2006.05.149
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The relaxation of the local ordering of nanoparticles induced by an external magnetic field in a concentrated Cobalt ferrofluid was studied by stroboscopic polarised small-angle neutron scattering. Magnetic and nuclear correlations were found to decay exponentially within a characteristic time of few seconds. The local hexagonal particle arrangements with aligned moments transform gradually to uncorrelated segments of dipolar chains. The dynamics is influenced by dipole-dipole interactions. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：453 / 456
页数：4
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