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

页码：136 / 139

页数：4