Brillouin Light Scattering Spectroscopy of Magneto-Acoustic Resonances In a Thin-Film Garnet Resonator

Author

Litvinenko, Artem N. ; Sadovnikov, Alexandr V. ; Tikhonov, Vladimir V. ; Nikitov, Sergey A.

Author_Institution

Saratov State Univ., Saratov, Russia

Volume

6

fYear

2015

fDate

7/7/1905 12:00:00 AM

Firstpage

1

Lastpage

4

Abstract

We used Brillouin light scattering to measure the local excitations of magneto-acoustic resonance at high spatial resolution in a laterally confined magnetic structure. We prepared a polished yttrium-iron garnet (YIG)/gadolinium-gallium garnet (GGG) square film resonator with highly efficient magneto-acoustic coupling. The structure was placed in a constant magnetic field and excited by a microwave current. The magneto-acoustic resonance had a high quality factor (Q ≃ 10⁵-10⁶). The acoustic resonance was confined to the center of the excited magnetic resonant mode. By exciting the resonant modes in the YIG layer, one can control the area of acoustic resonance excitation in the GGG substrate.

Keywords

Q-factor; garnets; magnetoacoustic resonance; resonators; Brillouin light scattering spectroscopy; Y₃Fe₅O₁₂-Gd₃Ga₅O₁₂; excited magnetic resonant mode; gadolinium gallium garnet; local excitations; magnetoacoustic resonance; microwave current; quality factor; square film resonator; thin film garnet resonator; yttrium-iron garnet; Brillouin scattering; Garnet films; Magnetic resonance; Magnetic separation; Magnetoacoustic effects; Magnetostatic waves; Magnetostatics; Microwave magnetics; Yttrium; Brillouin light scattering; Brillouin scattering; Magnonics; Microwave magnetics; gadolinium???gallium garnet; magneto-acoustic effects; magnetoacoustic effects; magnetostatic waves; microwave magnetics; yttrium???iron garnet;

fLanguage

English

Journal_Title

Magnetics Letters, IEEE

Publisher

ieee

ISSN

1949-307X

Type

jour

DOI

10.1109/LMAG.2015.2494008

Filename

7303930