Enhancement of surface magnetization in antiferromagnetic nanoparticles

被引：30
|
作者：
Bhowmik, R. N. [1 ]
Ranganathan, R. [1 ]
机构：
[1] Saha Inst Nucl Phys, Expt Condensed Matter Phys Div, Kolkata 700064, W Bengal, India
来源：
SOLID STATE COMMUNICATIONS | 2007年 / 141卷 / 07期
关键词：
antiferromagnetic nanoparticle; enhancement of magnetization; induced ferrimagnetic order; superparamagnetism;
D O I：
10.1016/j.ssc.2006.11.029
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report enhancement of magnetization below the antiferromagnetic ordering temperature T-N in nanoparticles of two antiferromagnets, viz CoRh2O4 and Cr2O3. The enhancement of magnetization below T-N is systematic, being larger for sample with smaller particle size. Scaling analysis showed that such enhancement of magnetization in CoRh2O4 nanoparticles is due to the superparamagnetic type contribution of surface (shell) spins. The present work shows that similar analysis can also be applied in Cr2O3 nanoparticles. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：365 / 368
页数：4
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