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.
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页码：669 / 674
页数：6
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