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

• Type: Article in International Scientific Journal
• Date: 2010

Authors

Awad, AA (Author) Other; Aranda, GR (Author) Other; Dieleman, D (Author) Other; Guslienko, KY (Author) Other; G.N. Kakazei (Author) REIT; Ivanov, BA (Author) Other; Aliev, FG (Author) Other

Journal

Title: Applied Physics Letters

Vol. 97 No. 15

ISSN: 0003-6951

Publisher: American Institute of Physics

Indexing

ISI Web of Knowledge - 55 Citations

ISI Web of Science

Scopus - 58 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-003-2RZ

DOI: 10.1063/1.3495774

Abstract (EN): 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]

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3