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Influencia de las interacciones de Dzyaloshinskii-Moriya en el espectro de ondas de espín de láminas ferromagnéticas delgadas

English: Influence of Dzyaloshinskii-Moriya interactions on the spin wave spectrum of thin ferromagnetic films

My Master thesis was written in 2013 at the Universidad Técnica Federico Santa María in Chile, under the supervision of Prof. Pedro Landeros. At that time I used LyX to typeset the thesis which made the process much easier. The thesis is written in spanish and contains original ideas about spin waves in thin ferromagnetic films with the Dzyaloshinskii-Moriya interaction (DMI). The approach is to assume a continuous material thus micromagnetics is the main theoretical framework for the derivations. Units in this work are cgs. This work was published as a paper in

https://doi.org/10.1088/0953-8984/25/15/156001

At the time the thesis was written there was a growing interest in materials with DMI, in particular because of the recent experimental verification of skyrmions in bulk ferromagnetic systems with a broken crystal symmetry. In my thesis we focused on thin films and there is an attempt to obtain the continuous DMI expression of 2D films (few monolayers). Nowadays (2021) these expressions are well known and there has been a substantial number of studies that have analysed and measured the magnitude of the DMI. Notably, our theoretical derivations predicted the asymmetry on the spin wave spectrum that could be verified using Brillouin Light Scattering. This has been proved in multiple studies now.

The original thesis can be found in the pdf folder. The source file requires updating of the references.

Copyright

The thesis is copyrighted by the UTFSM in Chile. If you want to cite any of the results, you can cite the aforementioned paper or using the following bibtex entry:

@mastersthesis{Cortes2013,
  author       = {Cort{\'e}s-Ortu{\~n}o, David}, 
  title        = {Influence of Dzyaloshinskii-Moriya interactions on the spin wave spectrum of thin ferromagnetic films},
  school       = {Departamento de F{\'i}sica, Universidad T{\'e}cnica Federico Santa Mar{\'i}a},
  year         = 2013,
  address      = {Avenida Espa{\~n}a 1680, Valpara{\'i}so, Chile},
  month        = 4,
}