Search for dissertations about: "NATURAL SCIENCES Physics Condensed matter physics Magnetism"

Showing result 1 - 5 of 58 swedish dissertations containing the words NATURAL SCIENCES Physics Condensed matter physics Magnetism.

  1. 1. Transmission Electron Microscopy for Characterization of Structures, Interfaces and Magnetic Moments in Magnetic Thin Films and Multilayers

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Hans Lidbaum; Klaus Leifer; Peter Svedlindh; Josef Zweck; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Transmission electron microscopy; TEM; magnetism; multilayer; superlattice; thin films; amorphous metals; electron energy-loss magnetic circular dichroism; EMCD; electron diffraction; NATURAL SCIENCES Physics Condensed matter physics Magnetism; NATURVETENSKAP Fysik Kondenserade materiens fysik Magnetism; NATURAL SCIENCES Physics Condensed matter physics Surfaces and interfaces; NATURVETENSKAP Fysik Kondenserade materiens fysik Ytor och mellanytor; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik; Engineering Science with specialization in Solid State Physics; Teknisk fysik med inriktning mot fasta tillståndets fysik; Materiefysik; Physics of Matter;

    Abstract : Structural characterization is essential for the understanding of the magnetic properties of thin films and multilayers. In this thesis, both crystalline and amorphous thin films and multilayers were analyzed utilizing transmission electron microscopy (TEM). READ MORE

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

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Andreas Persson; Dimitri Arvanitis; Cormac McGuinness; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; self organization; nano-magnet; xmcd; exafs; peem; magnetism; NATURAL SCIENCES Physics Condensed matter physics Surfaces and interfaces; NATURVETENSKAP Fysik Kondenserade materiens fysik Ytor och mellanytor; NATURAL SCIENCES Physics Condensed matter physics Magnetism; NATURVETENSKAP Fysik Kondenserade materiens fysik 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

  3. 3. Resonant switching and vortex dynamics in spin-flop bi-layers

    University dissertation from Stockholm : KTH

    Author : Sergiy Cherepov; Vladislav Korenivski; Thomas Silva; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; spin-dynamics; MRAM; vortex; switching; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik; NATURAL SCIENCES Physics Condensed matter physics Magnetism; NATURVETENSKAP Fysik Kondenserade materiens fysik Magnetism; NATURAL SCIENCES Physics Condensed matter physics Mesoscopic physics; NATURVETENSKAP Fysik Kondenserade materiens fysik Mesoskopisk fysik;

    Abstract : This thesis is a study of the static and dynamic behavior of the magne-tization in spin-flop bi-layers, which consist of two soft ferromagnetic layerscoupled by dipolar forces through a thin nonmagnetic spacer. The focus ofthe work is three fold: collective spin dynamics in the anti-parallel groundstate; resonant switching in the presence of thermal agitation; and static anddynamic behavior of the system in the vortex-pair state, with a particularemphasis on the interlayer core-core interaction. READ MORE

  4. 4. Atomistic modelling of functional solid oxides for industrial applications Density Functional Theory, hybrid functional and GW-based studies

    University dissertation from Stockholm : KTH

    Author : Cecilia Århammar; Rajeev Ahuja; Steven Louie; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; density functional theory; oxides; GW; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik; NATURAL SCIENCES Physics Condensed matter physics Magnetism; NATURVETENSKAP Fysik Kondenserade materiens fysik Magnetism; NATURAL SCIENCES Physics Condensed matter physics Defects and diffusion; NATURVETENSKAP Fysik Kondenserade materiens fysik Defekter och diffusion;

    Abstract : In this Thesis a set of functional solid oxides for industrial applications have been addressed by first principles and thermodynamical modelling. More specificially, measurable quantities such as Gibbs free energy, geometry and electronic structure have been calculated and compared when possible with experimental data. READ MORE

  5. 5. Nanocalorimetry of electronic phase transitions in systems with unconventional superconductivity and magnetic ordering

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Donato Campanini; Andreas Rydh; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanocalorimetry; Superconductivity; Magnetism; Electronic phase transitions; materiefysik; Physics Of Matter; Physics; fysik;

    Abstract : In this thesis, low temperature specific heat measurements on small (μg) single crystals of different superconducting and magnetic systems are presented. The device used in this work features a combination of high sensitivity and good accuracy over the temperature range 1-400 K and allows measurements in high magnetic fields. READ MORE