Thermal variation of the relaxation time of the magnetic moment of gamma-Fe2O3 nanoparticles with interparticle interactions of various strengths

被引：270

作者：

Dormann, JL

DOrazio, F

Lucari, F

Tronc, E

Prene, P

Jolivet, JP

Fiorani, D

Cherkaoui, R

Nogues, M

机构：

[1] UNIV LAQUILA, DIPARTIMENTO FIS, I-67100 LAQUILA, ITALY

[2] UNIV PARIS 06, LAB CHIM MAT CONDENSEE, URA 1466, F-75252 PARIS 05, FRANCE

[3] IST CHIM MAT, I-00016 MONTEROTONDO, ITALY

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.53.14291

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dynamical properties of gamma-Fe2O3 particles, dispersed in a polymer, were investigated by ac susceptibility (2x10(-2) Hz less than or equal to nu less than or equal to 10(4) HZ) Mossbauer spectroscopy measurements. The variation of the average blocking temperature as a function of the measuring time is satisfactorily described by a model which accounts for interparticle interactions by a statistical calculation of the dipolar energy for a disordered assembly of particles with a volume distribution and easy axes in random position.

引用

页码：14291 / 14297

页数：7

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