Experimental Evidence of Field-Induced Localization of Spin Excitations in NiFe Elliptical Rings by Micro-Focused Brillouin Light Scattering

Author

Madami, Marco ; Montoncello, Federico ; Capuzzo, Giulia ; Giovannini, Loris ; Nizzoli, Fabrizio ; Gubbiotti, Gianluca ; Tacchi, Silvia ; Carlotti, Giovanni ; Tanigawa, Hirobonu ; Ono, Teruo

Author_Institution

Dipt. di Fis., CNISM, Perugia, Italy

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1531

Lastpage

1536

Abstract

Micro-focused Brillouin light scattering has been exploited as a scanning probe technique to investigate the spatial localization and symmetry of magnetic excitations in elliptical nanorings. The interpretation of the experimental data has been achieved using the dynamical matrix method. Special attention is paid to the investigation of the soft-mode involved in the vortex-to-onion transition, to the localization of modes as a function of the external field, and to the to identification of the vortex chirality of a single ring.

Keywords

Brillouin spectra; iron alloys; nanostructured materials; nickel alloys; scanning probe microscopy; spin waves; NiFe; dynamical matrix method; elliptical nanorings; field-induced localization; magnetic excitation symmetry; microfocused Brillouin light scattering; mode localization; scanning probe technique; single ring vortex chirality; soft mode; spatial localization; spin excitations; vortex-to-onion transition; Brillouin scattering; Chemicals; Frequency; Light scattering; Magnetic confinement; Magnetic flux; Magnetic resonance; Magnetization; Probes; Resonance light scattering; Brillouin scattering; magnetic nanorings; micro-focusing; soft modes; spin waves;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2038798

Filename

5467515