Spin excitation frequencies in magnetostatically coupled arrays of vortex state circular Permalloy dots

被引：56

作者：

Awad, A. A. ^{[2
]}

Aranda, G. R. ^{[3
]}

Dieleman, D. ^{[2
]}

Guslienko, K. Y. ^{[1
,4
]}

Kakazei, G. N. ^{[5
,6
,7
]}

Ivanov, B. A. ^{[7
]}

Aliev, F. G. ^{[2
]}

机构：

[1] Univ Basque Country, Dpto Fis Mat, Donostia San Sebastian 20018, Spain

[2] Univ Autonoma Madrid, CIII, Dpto Fis Mat Condensada, Madrid 28049, Spain

[3] UPV, EHU, CSIC, Ctr Fis Mat, San Sebastian 20018, Spain

[4] Basque Fdn Sci, IKERBASQUE, Bilbao 48011, Spain

[5] Univ Porto, IN Inst Nanosci & Nanotechnol, P-4169007 Oporto, Portugal

[6] Univ Porto, IFIMUP, Fac Ciencias, Dipartimento Fis, P-4169007 Oporto, Portugal

[7] Natl Acad Sci Ukraine, Inst Magnetism, UA-03142 Kiev, Ukraine

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 13期

关键词：

D O I：

10.1063/1.3495774

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Broadband ferromagnetic resonance in square arrays of Permalloy circular dots with different interdot separations was measured in the vortex ground state. The detected spin excitations show a complicated dependence of their frequencies on the interdot coupling strength. A considerable influence of the interdot separation on the gyrotropic vortex frequency and splitting of the azimuthal spin wave frequencies was detected. The gyrotropic frequency and the first azimuthal doublet frequency splitting depend nonmonotonously on the interdot spacing, whereas the dependence of the second doublet frequency splitting on this parameter is monotonous. The observed effects are explained by the influence of both the dipolar and quadrupolar contributions to the dynamic magnetostatic interactions. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3495774]

引用

页数：3

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