Mossbauer and magnetization studies of iron oxide nanocrystals

被引：30

作者：

Haggstrom, Lennart ^{[1
]}

Kamali, Saeed ^{[1
,2
]}

Ericsson, Tore ^{[1
]}

Nordblad, Per ^{[3
]}

Ahniyaz, Anwar ^{[4
]}

Bergstrom, Lennart ^{[4
]}

机构：

[1] Uppsala Univ, Dept Phys, S-75121 Uppsala, Sweden

[2] Amirkabir Univ, Nano Res Ctr, Tehran, Iran

[3] Uppsala Univ, Dept Engn Sci, S-75121 Uppsala, Sweden

[4] Stockholm Univ, Dept Phys Inorgan & Struct Chem, S-10691 Stockholm, Sweden

来源：

HYPERFINE INTERACTIONS | 2008年 / 183卷 / 1-3期

关键词：

Maghemite nanoparticles; Anisotropy energy; Mossbauer spectroscopy; Magnetization;

D O I：

10.1007/s10751-008-9750-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Monodisperse iron oxide nanocrystals have been produced following non-hydrolytic, thermal decomposition routes. Spherically shaped particles with diameter of 4 and 12 nm and cubic shaped particles with an edge length of 9 nm have been studied. The particles have been shown to consist of mainly maghemite. A reduction of the saturation magnetic hyperfine field is observed for the 4 nm particles as compared to the corresponding bulk value. The anisotropy energy determined from the temperature variation of the magnetic hyperfine field was strongly enhanced for the 4 nm particles.

引用

页码：49 / 53

页数：5

共 12 条

[1] Preparation of iron oxide nanocrystals by surfactant-free or oleic acid-assisted thermal decomposition of a Fe(III) alkoxide [J].