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https://zone.biblio.laurentian.ca/handle/10219/2325
Titre: | Bond mean field theory for electron spin resonance frequency shift analysis |
Auteurs: | Rodger, Clifford John |
Mots clés: | ESR;spin lattices;bond-mean-field theory;solid state |
Date publié: | 24-fév-2015 |
Éditeur: | Laurentian University of Sudbury |
Abstrait: | Electron spin resonance (ESR) is an important experimental technique. A comprehensive theory of ESR has been di cult to establish, and as such several di erent approximations are used to predict and explain experimental results. This thesis applies the bond-mean- eld theory to the problem of ESR frequency shift for the one-dimensional antiferromagnetic Heisenberg spin chain with uniaxial exchange anisotropy. We use this theory to calculate the ESR resonance frequency shift as a function of temperature and magnetic eld. We perform numerical calculations using the expression obtained. These results are compared to existing results in the literature; they are in broad agreement with theoretical results such as those of Oshikawa and A eck obtained via bosonisation, but they show discrepancies with experimental results. We agree with the theoretical authors that the discrepancy is due to our use of the simplest-case interaction model. |
URI: | https://zone.biblio.laurentian.ca/dspace/handle/10219/2325 |
Apparaît dans les collections: | Master's Theses Physics / Physique - Master's Theses |
Fichiers dans cet item:
Fichier | Description | Taille | Format | |
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crodger_thesis_final_5.pdf | 1.5 MB | Adobe PDF | Parcourir/Ouvrir |
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