PHASE RESOLUTION OF SPIN WAVE PROPAGATION IN YIG FILM WITH LINEARLY VARYING WIDTH.
V.A. Gubanov 1, F.E. Garanin 1, A. V. Sadovnikov1;
1Saratov State University, Saratov, Russia
Abstract
The creation devices based on the principles of magnonics is of great interest for
areas, included the development storage and information signals processing [1]. Using
Brillouin spectroscopy of light scattering (BLS) technique, it is possible to detect the
propagation of a spin wave (SW). In the classical BLS system we detected the intensity
I_BLS of SW [2]. By adding an optical phase modulator to the BLS system, the phase of
the propagating SW can be resolved [3].
In this work, we study the propagation of SW with a phase resolution in a
yttrium iron garnet film (YIG) with linearly varying width [3] was fabricated by the
laser scribing technique. The described structure (see on fig. 1) represent YIG film with
a thickness t YIG = 10 μm with a saturation magnetization of 4πM 0 = 1750 G, formed on a gadolinium-gallium garnet (GGG) substrate with a thickness of t GGG = 500 μm. A
structure with a linearly varying width width of w = 2 mm and a length l=8 mm was
placed in an external magnetic field M0=1830 Oe to excite a magnetostatic surface spin
wave (MSSW).
BLS method will be used to study the formation the phase front of a spin wave in
a YIG film. Using micromagnetic modeling, agreement with the experimental data will
be shown, the intensity and phase of the SW will be compared and the optimal
parameters for the propagation of SW in the YIG film are revealed.
This work was supported by the Ministry of Education and Science of the Russian Federation as part of the state assignment (Project No. FSRR-2023-0008).
1. Nikitov S A., et. Al Phys. Usp. 58 1002–1028 (2015)
2. Zhu, Y. (Ed.). Modern Techniques for Characterizing Magnetic Materials (2005).
3. Serga, A. A., et. al. Applied Physics Letters, 89(6), 063506 (2006).
Speaker
Gubanov Vladislav
Saratov State University
Russia
Discussion
Ask question
