Varying the exchange interaction between NiO nanoparticles

被引：11

作者：

Bahl, Christian R. H.

Morup, Steen

机构：

[1] Tech Univ Denmark, Dept Phys, DK-2800 Kongens, Denmark

[2] Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark

来源：

NANOTECHNOLOGY | 2006年 / 17卷 / 12期

关键词：

D O I：

10.1088/0957-4484/17/12/001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We demonstrate that exchange interactions between antiferromagnetic nanoparticles of Fe-57-doped NiO can be varied by simple macroscopic treatments. Mossbauer spectroscopy studies of the superparamagnetic relaxation behaviour show that grinding or suspension in water of nanoparticles of NiO can significantly reduce interparticle interactions. Slow drying of aqueous suspensions of NiO nanoparticles did not lead to enhanced interparticle interactions. This is opposite to the behaviour of alpha-Fe2O3 (hematite) nanoparticles.

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页码：2835 / 2839

页数：5

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