Chen A, Sooryakumar R
Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.
Sci Rep. 2013 Nov 4;3:3124. doi: 10.1038/srep03124.
We present an all-magnetic scheme for the assembly and study of magnetic dipoles within designed confinement profiles that are activated on micro-patterned permalloy films through a precessing magnetic field. Independent control over the confinement and dipolar interactions is achieved by tuning the strength and orientation of the revolving field. The technique is demonstrated with superparamagnetic microspheres field-driven to assemble into closely packed lattice sheets, quasi-1D and other planar structures expandable into dipolar arrays that mirror the patterned surface motifs.
我们提出了一种全磁方案，用于在通过进动磁场激活的微图案坡莫合金薄膜上设计的限制轮廓内组装和研究磁偶极子。通过调节旋转场的强度和方向，可以独立控制限制和偶极相互作用。该技术通过超顺磁性微球进行了演示，这些微球在磁场驱动下组装成紧密堆积的晶格片、准一维结构以及其他可扩展为偶极阵列的平面结构，这些结构反映了图案化的表面图案。
