Search for dissertations about: "spin-density waves"

Found 3 swedish dissertations containing the words spin-density waves.

  2. 1. Spin Dynamics and Magnetic Multilayers

    Author : Björn Skubic; Olle Eriksson; Lars Nordström; Mark D. Stiles; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; magnetism; electronic structure; density functional theory; spin dynamics; spin-transfer torque; spin-density wave; multilayer; interface structure; Fysik;

    Abstract : Theoretical studies based on first-principles theory are presented for a number of different magnetic systems. The first part of the thesis concerns spin dynamics and the second part concerns properties of magnetic multilayers. The theoretical treatment is based on electronic structure calculations performed by means of density functional theory. READ MORE

  4. 2. Theory of X-ray Absorption Spectra and Spin Transfer Torque

    Author : Ola Wessely; Olle Eriksson; Lars Nordström; Eric Shirley; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; First principles calculations; X-ray absorption spectroscopy; Carbon nanotubes; Helical spin density waves; Hydrogen storage; Spin transfer torque; Fysik; Physics; Fysik;

    Abstract : The subjects of the thesis are theoretical first principles calculations of X-ray absorption (XA) spectra and current induced spin transfer torque. XA spectra calculated from atomic multiplet theory and from band structure calculations, based on density functional theory for La0.7Sr0.3MnO3 have been compared to experiment. READ MORE

  5. 3. Magnetism in layered materials

    Author : Anders Niklasson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

    Abstract : Magnetic properties of layered materials have been studied by means of electronic structure calculations based on density functional theory.The occurrence of confined quantum-well states in thin films has been investigated and put into relation with the topology of the corresponding bulk Fermi surface. READ MORE