Orientational order of self-assembled magnetic nanocrystals

被引：5

作者：

Kamali, Saeed ^{[1
]}

Itou, Masayoshi ^{[2
]}

Kodama, Akio ^{[3
]}

Stroeve, Pieter ^{[4
]}

Sakurai, Yoshiharu ^{[2
]}

机构：

[1] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA

[2] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan

[3] Mizuho Informat & Res Inst Inc, Chiyoda Ku, Tokyo 1018443, Japan

[4] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 02期

基金：

日本学术振兴会;

关键词：

LOW-TEMPERATURE PHASE; MOSSBAUER-SPECTROSCOPY; NANOPARTICLES; TRANSITION; FE3O4;

D O I：

10.1103/PhysRevB.85.024506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetization directions of self assembly of monodispersed magnetic nanocrystallites with different shapes have been revealed by a direct probe. The orientations of monodispersed maghemite nanocrystallites with spherical and cubic shapes, which are prepared through a drying process, are studied by means of magnetic Compton scattering. By utilizing this technique, a direct measurement of nanocrystallite orientation is possible, and we find that the shape of magnetic Compton profiles is different between spherical and cubic nanocrystallites. The preferential orientation of the spherical nanocrystallites is the [100] direction along the applied magnetic field, while for the cubic ones it is a mix of the [100], [110], and [111] directions. This result indicates that the shape of nanocrystallites is one of the important intrinsic factors that controls the assembly of nanocrystallites under a magnetic field.

引用

页数：5

共 24 条

[1] MAGNETOCRYSTALLINE ANISOTROPY OF LOW-TEMPERATURE PHASE OF MAGNETITE [J].