FERROFLUID DYNAMICS - SPIN-ECHO EXPERIMENT

被引：12

作者：

LEBEDEV, VT

GORDEEV, GP

PANASIUK, EA

KISS, L

CSER, L

ROSTA, L

TOROK, G

FARAGO, B

机构：

[1] HUNGARIAN ACAD SCI,SOLID STATE PHYS RES INST,POB 49,H-1525 BUDAPEST,HUNGARY

[2] PNPI,GATCHINA 188350,RUSSIA

[3] ILL GRENOBLE,GRENOBLE,FRANCE

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1993年 / 122卷 / 1-3期

关键词：

D O I：

10.1016/0304-8853(93)91045-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dependence of the dynamical behaviour of ferrofluid (FF) subsystems, i.e. nuclear and magnetic contributions to the scattering cross section, on the external magnetic field has been observed. In zero field, the nuclear subsystem of FF has a soft mode with the relation omega approximately q4, which can be explained by means of a dipole-bond fractal. This fractal gets broken by applying a magnetic field and then the motion of particles approaches ordinary diffusion, i.e. omega approximately q2. The magnetic subsystem is superparamagnetic in a low field and it reveals the fast relaxation of spin components transversal to magnetization in a high field.

引用

页码：83 / 89

页数：7

共 10 条

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AKSELROD LA, 1986, ZH EKSP TEOR FIZ+, V91, P531

[2] THE STRUCTURE OF MAGNETIC PARTICLES STUDIED BY SMALL-ANGLE NEUTRON-SCATTERING [J].