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Surface effects in noninteracting and interacting γ-Fe2O3 nanoparticles

被引：125
作者：
Tronc, E
Fiorani, D
Noguès, M
Testa, AM
Lucari, F
D'Orazio, F
Grenèche, JM
Wernsdorfer, W
Galvez, N
Chanéac, C
Mailly, D
Jolivet, JP
机构：
[1] UPMC, CNRS, UMR 7574, LCMC, F-75252 Paris 05, France
[2] CNR, ISM, Area Ric Roma, I-00016 Monterotondo, Rome, Italy
[3] UVSQ, CNRS, UMR 8634, LMOV, F-78035 Versailles, France
[4] Univ Aquila, Dipartimento Fis, I-67010 Coppito, Italy
[5] INFM, I-67010 Coppito, Italy
[6] Univ Maine, CNRS, UMR 6087, LPEC, F-72085 Le Mans 9, France
[7] CNRS, Lab Louis Neel, F-38042 Grenoble 9, France
[8] UPMC, CNRS, UMR 7071, CIM2, F-75252 Paris 05, France
[9] CNRS, IPM, F-91460 Marcoussis, France
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2003年 / 262卷 / 01期
关键词：
fine particles; exchange anisotropy; coercivity; hysteresis; maghemite; ferrites;
D O I：
10.1016/S0304-8853(03)00011-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
From AC susceptibility, magnetization and Mossbauer spectroscopy measurements, we show the dominant role of the surface properties and surface-to-core exchange coupling on the static and dynamic properties of gamma-Fe2O3 particles (2.7, 4.6 and 8.7 nm) dispersed in a polymer or powdered. Measurements of the switching field of individual particles are presented. demonstrating basic surface effects, (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：6 / 14
页数：9
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