Small-angle scattering investigations of cobalt-ferrofluids using polarised neutrons

被引：20

作者：

Wiedenmann, A ^{[1
]}

Hoell, A ^{[1
]}

Kammel, M ^{[1
]}

机构：

[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2002年 / 252卷 / 1-3期

关键词：

magnetic colloids; polarised neutrons; small angle neutron scattering;

D O I：

10.1016/S0304-8853(02)00730-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Combining contrast variation using polarised neutrons and various HID mixtures of solvents allowed different structural units in Co-ferrofluids to be identified by small-angle scattering. In diluted liquids, the magnetic core behaves as a non-interacting single-domain. The core is encapsulated by a shell of surfactant molecules which was found to be impenetrable for the solvent. In more concentrated samples aggregation appears in an external magnetic field which is described by a densely random packing of hard spheres. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：83 / 85

页数：3

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