Search for dissertations about: "non-collinear magnetism"
Showing result 1 - 5 of 13 swedish dissertations containing the words non-collinear magnetism.
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1. Non-collinear Magnetism in d- and f-electron Systems
Abstract : In this thesis, non-collinear magnetism has been studied by using density functional theory and the augmented plane wave method with local orbitals (APW+lo). Two conditions for non-collinear instabilities have been identified in this thesis. First, the Fermi energy should cut through both spin up and down states. READ MORE
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2. A Theoretical Study of Magnetism in Nanostructured Materials
Abstract : A first-principles linear scaling real-space method for investigating non-collinear magnetic behaviour of nanostructured materials has been developed. With this method, the magnetic structures of small supported transition metal clusters have been examined. READ MORE
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3. Augmented Planewaves, Developments and Applications to Magnetism
Abstract : The present thesis concerns method development and applications in the field of first principles electronic structure calculations.Augmented planewaves combine the simple planewaves with exact solutions of the Schrödinger equation for a spherical potential. READ MORE
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4. Trends in Magnetism : From Strong Correlations to “-onics” Technology
Abstract : Despite of enormous progress in experimental nanophysics theoretical studies of low-dimensional electron systems still remains a challenging task. Indeed, most of the structures are strongly correlated, so that an effective perturbative treatment is impossible due to the lack of a small parameter. READ MORE
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5. Electronic structure and exchange interactions from ab initio theory : New perspectives and implementations
Abstract : In this thesis, the magnetic properties of several materials were investigated using first principle calculations. The ab initio method named real space linear muffin-tin orbitals atomic sphere approximation (RS-LMTO-ASA) was used to calculate the electronic structure and magnetic properties of bulk systems, surface and nanostructures adsorbed on surfaces. READ MORE