Normalization factors for magnetic relaxation of small-particle systems in a nonzero magnetic field

被引：25

作者：

Balcells, L

Iglesias, O

Labarta, A

机构：

[1] UNIV BARCELONA,FAC FIS,DEPT FIS FONAMENTAL,E-08028 BARCELONA,SPAIN

[2] CSIC,INST CIENCIA MAT,BELLATERRA 08193,SPAIN

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.55.8940

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We critically discuss relaxation experiments in magnetic systems that can be characterized in terms of an energy barrier distribution, showing that proper normalization of the relaxation data is needed whenever curves corresponding to different temperatures are to be compared. We show how these normalization factors can be obtained from experimental data by using the Tln(t/tau(0)) scaling method without making any assumptions about the nature of the energy barrier distribution. The validity of the procedure is tested using a ferrofluid of Fe3O4 particles.

引用

页码：8940 / 8944

页数：5

共 32 条

[1]

ARNAUDAS JI, 1995, P NATO ADV RES WORKS

[2]

ASHCROFT NW, 1979, SOLID STATE PHYSICS

[3] 2-VARIABLES SCALING OF THE MAGNETIC VISCOSITY IN BA-FERRITE NANO-PARTICLES [J].