Magnetic phase ordering in ferrogels under applied field

被引：7
|
作者：
Lebedev, VT
Torok, G
Cser, L
Buyanov, AL
Revelskaya, LG
Orlova, DN
Sibilev, AI
机构：
[1] Solid State Phys Res Inst, H-1525 Budapest, Hungary
[2] Petersburg Nucl Phys Inst, Gatchina 188350, St Petersburg D, Russia
[3] Russian Acad Sci, Inst Macromol Cpds, St Petersburg 199004, Russia
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 201卷
基金：
匈牙利科学研究基金会;
关键词：
neutron scattering; ferrogel; magnetic ordering;
D O I：
10.1016/S0304-8853(99)00010-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new cross linked polymer compound (hydrogel) with fine Fe3O4-grains embedded in it has been investigated by neutron scattering. We studied the nanoscale structures of these ferrogels synthesized in a magnetic field and without a magnetic field. By means of polarized neutron scattering we studied the self-assembly of the particles under the influence of the magnetic field. Even in a weak field (H similar to 65 Oe) the ferrogel showed strong spatial correlations of the particles; a strong held (H similar to 4 kOe) induced slow growth of the interference effect. Over the observation time (several tens of hours) a cluster formation of particles was observed. This magnetic ordering is reversible: it disappears when switching off the external field. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：136 / 139
页数：4
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