Size-dependent magnetic properties of nanocrystalline yttrium iron garnet powders

被引：75

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

页码：212 / 219

页数：8

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