Size-dependent magnetic properties of nanocrystalline yttrium iron garnet powders

被引：74
|
作者：
Rajendran, M
Deka, S
Joy, PA
Bhattacharya, AK [1 ]
机构：
[1] Univ Warwick, Sch Engn, Warwick Proc Technol Grp, Coventry CV4 7AL, W Midlands, England
[2] Natl Chem Lab, Phys & Mat Chem Div, Pune 411008, Maharashtra, India
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 301卷 / 01期
关键词：
YIG; nanoparticles; magnetism; superparamagnetism; anisotropy constant;
D O I：
10.1016/j.jmmm.2005.06.027
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Yttrium iron garnet (YIG) powders with particle sizes of 9, 14, 25 and 60 nm have been synthesised and their magnetic properties have been studied as a function of particle size and temperature. The particles with sizes of 9 and 14 nm exhibited superparamagnetism. The blocking temperature (T-B) decreased with decreasing particle size, whereas the anisotropy constant (K) increased. The saturation magnetisation (M-s) decreased with decreasing particle size. These variations are attributed to large surface-to-volume ratios in nanoparticles where the surface moments are predominant. (c) 2005 Published by Elsevier B.V.
引用
收藏
页码：212 / 219
页数：8
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