Planar magnetic colloidal crystals

被引：89

作者：

Wen, WJ ^{[1
]}

Zhang, LY ^{[1
]}

Sheng, P ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.85.5464

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a novel form of planar magnetic colloidal crystals formed by coated magnetic microspheres floating on a liquid meniscus. Under an external magnetic field, the balance between the repulsive magnetic interaction and the "attractive" interaction, due to the weight of the particles projected along the surface tangent, yields not only the triangular lattice with a variable lattice constant, but also all the other planar crystal symmetries such as the oblique, centered-rectangular, rectangular, and square lattices. By using two different sized magnetic particles, local formations of 2D quasicrystallites with fivefold symmetry are also observed.

引用

页码：5464 / 5467

页数：4

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