Stabilization of the in-plane vortex state in two-dimensional circular nanorings

被引：16
作者：
Mamica, S. [1 ]
机构：
[1] Adam Mickiewicz Univ, Fac Phys, PL-61614 Poznan, Poland
来源：
JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 09期
关键词：
SPIN-WAVES; EXCITATION; NEIGHBORS; VORTICES; RINGS;
D O I：
10.1063/1.4794004
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study two-dimensional circular nanorings composed of elementary magnetic moments arranged in sites of a square lattice. Using a microscopic approach that takes into account the dipolar and nearest-neighbor exchange interactions, we calculate the spin-wave frequencies and profiles to draw conclusions regarding the stability of the assumed magnetic configuration. We show that, in contrast to square rings, in circular rings the exchange-driven reorientation is sensitive to both the external and internal sizes of the ring. We associate this behavior with the delocalized character of the lowest spin-wave excitation, and show that, consequently, the in-plane vortex state can be stabilized even in the case of strong exchange interactions. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4794004]
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页数：6
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