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Theoretical study of the spin wave beams in thin ferromagnetic films

Paweł Gruszecki

Abstract

Spin waves are promising information carriers and their utilization can result in designing a new class of efficient and low energy consuming information processing devices – magnonic units. Nowadays, the most popular approach is consideration of spin waves propagating in the form of plane-waves or spin waves propagating in confined structures. However, magnonic devices based on planar structures with the spin wave beams can be also exploited to transfer and process information. Moreover, the spin wave beams could be used as a tool to study magnetic properties locally and to deeper knowledge about spin wave dynamics. The main objective of the thesis is the theoretical analysis of spin wave beam dynamics in ferromagnetic films. The research is focused on the coherent low-divergence spin wave beams. Spin wave beams reflection, refraction, lateral shifts along the interface between incident and reflected (or transmitted) beam spots (Goos-Hänchen effect), and beam bending due to non-uniform internal magnetic field are extensively analyzed. Also, the collimation of monochromatic beams of spin waves has been studied. Furthermore, the method suitable for spin wave beams excitation using width-modulated microwave transducers is proposed. The designed microwave antennae enables excitation of multiple spin wave beams of different widths in the single ferromagnetic film.
Record ID
UAMefcdb21e8e78412a95fe585e062d01f7
Diploma type
Doctor of Philosophy
Author
Paweł Gruszecki (SNŚ/WyF/DoNP) Paweł Gruszecki,,
Title in Polish
Teoretyczna analiza wiązek fal spinowych w cienkich warstwach ferromagnetycznych
Title in English
Theoretical study of the spin wave beams in thin ferromagnetic films
Language
en English
Certifying Unit
Faculty of Physics (SNŚ/WyF/FoP)
Discipline
physics / (physical sciences domain) / (physical sciences)
Scientific discipline (2.0)
6.6 physical sciences
Defense Date
03-07-2017
End date
03-07-2017
Supervisor
URL
http://hdl.handle.net/10593/18100 opening in a new tab
Keywords in English
magnonic, spin waves, spin wave beams
Abstract in English
Spin waves are promising information carriers and their utilization can result in designing a new class of efficient and low energy consuming information processing devices – magnonic units. Nowadays, the most popular approach is consideration of spin waves propagating in the form of plane-waves or spin waves propagating in confined structures. However, magnonic devices based on planar structures with the spin wave beams can be also exploited to transfer and process information. Moreover, the spin wave beams could be used as a tool to study magnetic properties locally and to deeper knowledge about spin wave dynamics. The main objective of the thesis is the theoretical analysis of spin wave beam dynamics in ferromagnetic films. The research is focused on the coherent low-divergence spin wave beams. Spin wave beams reflection, refraction, lateral shifts along the interface between incident and reflected (or transmitted) beam spots (Goos-Hänchen effect), and beam bending due to non-uniform internal magnetic field are extensively analyzed. Also, the collimation of monochromatic beams of spin waves has been studied. Furthermore, the method suitable for spin wave beams excitation using width-modulated microwave transducers is proposed. The designed microwave antennae enables excitation of multiple spin wave beams of different widths in the single ferromagnetic film.

Uniform Resource Identifier
https://researchportal.amu.edu.pl/info/phd/UAMefcdb21e8e78412a95fe585e062d01f7/

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