Low temperature experimental investigation of finite-size and surface effects in CuFe2O4 nanoparticles of ferrofluids

被引：37

作者：

Alves, CR ^{[1
]}

Aquino, R ^{[1
]}

Sousa, MH ^{[1
]}

Rechenberg, HR ^{[1
]}

Goya, GF ^{[1
]}

Tourinho, FA ^{[1
]}

Depeyrot, J ^{[1
]}

机构：

[1] Univ Brasilia, Inst Fis, BR-70919970 Brasilia, DF, Brazil

来源：

ISMANAM 2003: METASTABLE, MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS | 2004年 / 20-21卷

关键词：

ferrites; finite size; magnetic nanoparticles; Mossbauer spectroscopy; surface effects;

D O I：

10.4028/www.scientific.net/JMNM.20-21.694

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Size sorted magnetic nanoparticles based on copper ferrite have been chemically synthesized. Their magnetic properties have been investigated at low temperature using Mossbauer spectroscopy and magnetisation measurements. The thermal variation of the magnetization is strongly affected by finite size and surface effects. Indeed, the Mossbauer results show that the structure of the nanoparticles is made of a monodomain ordered core and a surface shell of disordered spins.

引用

页码：694 / 699

页数：6

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