The initial susceptibility in the FC and ZFC magnetisation processes

被引：27

作者：

Papusoi, C ^{[1
]}

Stancu, A ^{[1
]}

Dormann, JL ^{[1
]}

机构：

[1] UNIV VERSAILLES,CNRS,LAB MAGNETISME & OPT,F-78035 VERSAILLES,FRANCE

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1997年 / 174卷 / 03期

关键词：

FC process; ZFC process; Stoner-Wohlfarth model; two-level model; master equation; superparamagnetism;

D O I：

10.1016/S0304-8853(97)00203-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new 'blocking temperature' model for the field-cooled and zero-field-cooled magnetisation processes for fine ferromagnetic particle systems is presented. On the basis of Stoner-Wohlfarth model and the discrete two-level model for the thermal relaxation, both blocked and superparamagnetic contributions to the sample magnetic moment are calculated. The effects of volume and easy-axis orientation distributions and also of the temperature rate are taken into account; a Lorentz mean field term is also considered. The simulation results are discussed.

引用

页码：236 / 246

页数：11

共 19 条

[1] THERMAL FLUCTUATIONS OF A SINGLE-DOMAIN PARTICLE
BROWN, WF
[J]. PHYSICAL REVIEW, 1963, 130 (05): : 1677 - +
[2] RATE DEPENDENCE OF THE FIELD-COOLED MAGNETIZATION OF A FINE PARTICLE SYSTEM
CHANTRELL, RW
WOHLFARTH, EP
[J]. PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1985, 91 (02): : 619 - 626
[3] THE LOW FIELD SUSCEPTIBILITY OF A TEXTURED SUPERPARAMAGNETIC SYSTEM
CHANTRELL, RW
AYOUB, NY
POPPLEWELL, J
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1985, 53 (1-2) : 199 - 207
[4] STATIC MAGNETIC-PROPERTIES AT LOW AND MEDIUM FIELD AT GAMMA-FE2O3 PARTICLES WITH CONTROLLED DISPERSION
CHERKAOUI, R
NOGUES, M
DORMANN, JL
PRENE, P
TRONC, E
JOLIVET, JP
FIORANI, D
TESTA, AM
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1994, 30 (02) : 1098 - 1100
[5] Effect of an oblique magnetic field on the superparamagnetic relaxation time
Coffey, WT
Crothers, DSF
Dormann, JL
Geoghegan, LJ
Kalmykov, YP
Waldron, JT
Wickstead, AW
[J]. PHYSICAL REVIEW B, 1995, 52 (22): : 15951 - 15965
[6] Thermal variation of the relaxation time of the magnetic moment of gamma-Fe2O3 nanoparticles with interparticle interactions of various strengths
Dormann, JL
DOrazio, F
Lucari, F
Tronc, E
Prene, P
Jolivet, JP
Fiorani, D
Cherkaoui, R
Nogues, M
[J]. PHYSICAL REVIEW B, 1996, 53 (21) : 14291 - 14297
[7] A DYNAMIC STUDY OF SMALL INTERACTING PARTICLES - SUPERPARAMAGNETIC MODEL AND SPIN-GLASS LAWS
DORMANN, JL
BESSAIS, L
FIORANI, D
[J]. JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1988, 21 (10): : 2015 - 2034
[8] Dormann JL, 1997, ADV CHEM PHYS, V98, P283, DOI 10.1002/9780470141571.ch4
[9] FIELD-DEPENDENCE OF THE BLOCKING TEMPERATURE IN THE SUPERPARAMAGNETIC MODEL - H2/3 COINCIDENCE
DORMANN, JL
FIORANI, D
ELYAMANI, M
[J]. PHYSICS LETTERS A, 1987, 120 (02) : 95 - 99
[10] SUSCEPTIBILITY PHENOMENA IN A FINE PARTICLE SYSTEM .1. CONCENTRATION-DEPENDENCE OF THE PEAK
ELHILO, M
OGRADY, K
CHANTRELL, RW
[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1992, 114 (03) : 295 - 306

← 1 2 →