Search for dissertations about: "SURFACE MAGNETISM"

Showing result 1 - 5 of 40 swedish dissertations containing the words SURFACE MAGNETISM.

2. 1. X-ray Absorption Spectroscopy on Nano-Magnet Arrays and Thin Films : Magnetism and Structure

   Author : Andreas Persson; Dimitri Arvanitis; Cormac McGuinness; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; self organization; nano-magnet; xmcd; exafs; peem; magnetism; Surfaces and interfaces; Ytor och mellanytor; Magnetism; Magnetism; Materiefysik; Physics of Matter;

   Abstract : The magnetic and structural properties of nano magnet arrays and ferromagnetic thin films are investigated. Circular x-rays are used and extensive use is made in this Thesis of the X-ray Magnetic Circular Dichroism (XMCD) technique. By means of the XMCD magneto-optic sum rules the values of the orbital and spin moments are determined. READ MORE

4. 2. Magnetism and Structure in Metallic Multilayers

   Author : Erik Holmström; Turek Ilja; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Magnetism; Interfaces; Structure; KKR-ASA; CPA; Quantum Well; Fysik; Physics; Fysik;

   Abstract : The interplay between magnetism and structure has been studied in magnetic multilayers by electronic structure calculations based on density functional theory and analyzed in terms of models. The main ideas behind the Korringa-Kohn-Rostocker Green’s function method are described and the implementation of the coherent potential approximation is outlined. READ MORE

5. 3. Trends in Magnetism : From Strong Correlations to “-onics” Technology

   Author : Dmitry Yudin; Olle Eriksson; Grigori Volovik; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Strongly interacting electron systems; Spin dynamics; Topological matter; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   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

6. 4. A Theoretical Study of Magnetism in Nanostructured Materials

   Author : Anders Bergman; Olle Eriksson; Lars Nordström; Hugues Dreysse; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; magnetism; clusters; non-collinear; multilayers; first-principles theory; electronic structure; high-moment materials; exchange interactions; linear scaling methods; Fysik;

   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

7. 5. Theoretical Studies of Magnetism and Electron Correlation in Solids

   Author : Oscar Grånäs; Lars Nordström; Biplab Sanyal; Silke Biermann; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Magnetism; Superconductivity; Electron Correlation; DMFT; DFT; Actinides; multipoles; hidden order; magnetic anisotropy; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Abstract : This work presents new development and applications of ab-initio simulation tools for material science. Focus lies on materials with strong electronic correlation and strong spin-orbit coupling. READ MORE