Dynamical properties of gamma-Fe2O3 nanoparticles dispersed in a polymer

被引：12

作者：

Dormann, JL

DOrazio, F

Lucari, F

Spinu, L

Tronc, E

Prene, P

Jolivet, JP

Fiorani, D

机构：

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

[2] UNIV PARIS 06, LCMC, F-75252 PARIS 05, FRANCE

[3] CNR, IC MAT, I-00016 MONTEROTONDO, ITALY

来源：

SYNTHESIS AND PROPERTIES OF MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS, PTS 1 AND 2 - ISMANAM-96 | 1997年 / 235-2卷

关键词：

nanoparticles; magnetic properties; anisotropies;

D O I：

10.4028/www.scientific.net/MSF.235-238.669

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 have been investigated by a.c, susceptibility and Mossbauer spectroscopy measurements. The frequency dependence of the blocking temperature is satisfactorily described by a superparamagnetic model. The results provide evidence that the main source of anisotropy is the surface anisotropy, adding to a small volume term, due to the magnetostatic anisotropy energy with a negative constant.

引用

页码：669 / 674

页数：6

共 8 条

[1]

COFFEY WT, 1993, JMMM, V127, pL154

[2] NANOPHASE MAGNETIC-MATERIALS - SIZE AND INTERACTION EFFECTS ON STATIC AND DYNAMICAL PROPERTIES OF FINE PARTICLES [J].