Magnetic interactions and reversal of artificial square spin ices

被引：20
|
作者：
Phatak, C. [1 ]
Pan, M. [1 ,2 ]
Petford-Long, A. K. [1 ,2 ,3 ]
Hong, S. [1 ]
De Graef, M. [4 ]
机构：
[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
[2] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
[3] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA
[4] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA
来源：
NEW JOURNAL OF PHYSICS | 2012年 / 14卷
关键词：
Room temperature - Nanomagnetics - Intelligent systems;
D O I：
10.1088/1367-2630/14/7/075028
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Artificial spin ices are nanoscale geometrically engineered systems that mimic the behavior of bulk spin ices at room temperature. We describe the nanoscale magnetic interactions in a square spin ice lattice by an experimentally verified model that accounts for the correct shape of the magnetic islands. Magnetic force microscopy measurements on lithographically fabricated lattices are compared to Monte Carlo simulations of the reversal process of two lattices with different lattice spacings. Lattice node statistics and correlations show significant differences in the reversal mechanism for lattices with different spacings. The effect of structural variations is also compared for the two lattice reversals.
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收藏
页数：14
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