Effect of interdot coupling on spin-wave modes in nanoparticle arrays

被引：86
作者：
Giovannini, L. [1 ]
Montoncello, F. [1 ]
Nizzoli, F. [1 ]
机构：
[1] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy
来源：
PHYSICAL REVIEW B | 2007年 / 75卷 / 02期
关键词：
D O I：
10.1103/PhysRevB.75.024416
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have developed a theory for the determination of the collective spin-wave modes of regular arrays of magnetic particles, taking into account the dipolar interaction among particles. The frequencies and profiles of the spin modes of arrays of permalloy cylindrical particles with different interparticle separation have been calculated with a numerical implementation of this model, using a three-dimensional representation of the magnetic particles in their actual nonuniform fundamental state. The results show a very good agreement with recently published experimental data, and allow us to discuss the dispersion curves and some relevant properties of the Brillouin light-scattering intensity from spin modes in periodic arrays.
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页数：7
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