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Magnon modes in permalloy nanorings

Authors :
C. E. Zaspel
B.A. Ivanov
Source :
Journal of Magnetism and Magnetic Materials. 286:366-369
Publication Year :
2005
Publisher :
Elsevier BV, 2005.

Abstract

Submicron permalloy rings can have a vortex ground state as a result of the competing effects arising from the exchange and magnetostatic interactions. The dynamic properties of this state are investigated by analytical calculations of the structure and frequencies of the magnon normal modes in the presence of the vortex–magnon interaction. For thin rings of thickness, L = 60 nm and inner and outer radii, Ri and Ro=200 nm, respectively it is shown that the magnon node frequencies in the 10 GHz range for rings of radii of a few hundred nanometers. Moreover, the frequencies are slowly increasing functions of Ro for fixed Ro.

Details

ISSN :
03048853
Volume :
286
Database :
OpenAIRE
Journal :
Journal of Magnetism and Magnetic Materials
Accession number :
edsair.doi...........394e5752072ef901e70ddc37a6716746
Full Text :
https://doi.org/10.1016/j.jmmm.2004.09.093