Magnetic vortex core in cylindrical nanostructures: Looking for its stability in terms of geometric and magnetic parameters

被引:9
作者
Riveros, A. [1 ]
Vidal-Silva, N. [1 ]
Landeros, P. [2 ,4 ]
Altbir, D. [1 ,4 ]
Vogel, E. E. [3 ,4 ]
Escrig, J. [1 ,4 ]
机构
[1] Univ Santiago Chile USACH, Dept Fis, Santiago 9170124, Chile
[2] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile
[3] Univ La Frontera, Dept Ciencias Fis, Temuco, Chile
[4] Ctr Dev Nanosci & Nanotechnol CEDENNA, Santiago 9170124, Chile
关键词
Magnetic vortex core; Magnetic phase diagram; Cylindrical nanostructures; Continuous magnetization model; Nanorings; REVERSAL; DRIVEN;
D O I
10.1016/j.jmmm.2015.10.092
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The relative stability of out-of-plane ferromagnetic, vortex without core and vortex with core configurations in cylindrical nanostructures are examined in terms of their geometric and magnetic parameters. Numerical calculations are done for general geometrical structures, while analytical expressions are obtained in the limiting cases of very long nanostructures. A magnetic phase diagram that clearly identifies the parameters required to obtain a vortex with core as minimum energy configuration is obtained by computing the transition lines between these configurations. The results define the geometric and magnetic parameters for which the vortex state can be made more stable by removing the highly energetic vortex core. Finally, a phase diagram that may be useful for the potencial use of vortices in technological applications is obtained and discussed. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码:848 / 852
页数:5
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