Simulated lifetime of magnons and short wavelength distortion of magnons in bcc iron and fcc cobalt
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
The topic of this report is in electron spin dynamics where simulations where made using the UppASD simulations software based on the Landau-Lifshits-Gilbert equation. When many spins act together they form a wavelike movement called a magnon. It is believed that the magnon can be used as information carrier in next generation of technology. We found that the lifetime of magnons in zero Kelvin in bcc iron and fcc cobalt decreases with higher damping and with smaller simulated structures for magnons with the same wavelength as the structure. Magnons with shorter wavelength than the structure are unstable and restructures itself to form a magnon of the same size as the structure. In a structure with a temperature, magnons with short wavelengths can exist at many energy levels. The short wavelength distortion was measured to increase linearly with higher temperature and linearly with higher damping for bcc iron and fcc cobalt.
Place, publisher, year, edition, pages
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-202488OAI: oai:DiVA.org:uu-202488DiVA: diva2:632069
Master Programme in Engineering Physics