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The Magnon-Phonon coupling from a microscopic perspective
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Theory. Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
2019 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

In this project a microscopic description of the magnon-phonon coupling is rederived. This theory is then used to simulate the thermalization process between the spin and lattice system in NiO. It is argued that the Kusuya-LeCraw process (1 mg + 1 ph into 1 mg) cannot be the reason that the phononic and magnonic systems reach a thermal equilibrium. As a consequence a quasi-stable equilibrium, different from the thermal solution, is reached in less than 1 ps for NiO. Finally, the effect of applying an external magnetic field to the system, breaking the degeneracy between the magnons of opposite polarization, is studied.

Place, publisher, year, edition, pages
2019. , p. 45
Series
TVE-F ; 19006
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:uu:diva-385931OAI: oai:DiVA.org:uu-385931DiVA, id: diva2:1326552
Educational program
Master Programme in Engineering Physics
Supervisors
Examiners
Available from: 2019-06-28 Created: 2019-06-18 Last updated: 2019-06-28Bibliographically approved

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