Advanced search

Showing result 1 - 5 of 33 swedish dissertations matching the above criteria.

  2. 1. Metal-hydrogen interactions studied by nuclear techniques

    Author : Björgvin Hjörvarsson; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : .... READ MORE

  4. 2. Critical Phenomena and Exchange Coupling in Magnetic Heterostructures

    Author : Martina Ahlberg; Gabriella Andersson; Björgvin Hjörvarsson; Steve Bramwell; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; phase transitions; critical behavior; 2D XY model; MOKE; magnetic thin films and superlattices; amorphous multilayers; magnetic proximity effects; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : The continuous phase transition in thin magnetic films and superlattices has been studied using the magneto-optical Kerr effect (MOKE) and polarized neutron scattering (PNR).  It has been shown that the critical behavior of amorphous thin films belonging to the 2D XY universality class can be described within the same theory as crystalline sample. READ MORE

  5. 3. Magnetic Order in Artificial Structures

    Author : Unnar B. Arnalds; Björgvin Hjörvarsson; Sveinn Ólafsson; Vassilios Kapaklis; Hartmut Zabel; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The topic of this thesis is the investigation of the magnetic properties of artificially created magnetic structures. Applying different characterization techniques, ranging from direct imaging methods to reciprocal space techniques, the properties of lithographically patterned arrays of magnetic thin film and multilayer elements are investigated by exploring their magnetic state, extending from the atomic scale up to collective ordering phenomena of nano-magnetic elements. READ MORE

  6. 4. Growth and Magnetic Properties of Fe- and FeNi-based Thin Films and Multilayers

    Author : Anna Maria Blixt; Björgvin Hjörvarsson; Gabriella Andersson; Panagiotis Poulopoulos; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Sputter growth; Permalloy; Multilayer; Superlattice; Magnetism; Fysik; Physics; Fysik;

    Abstract : This thesis concerns the growth and magnetic properties of thin films and multilayers. The samples were grown by magnetron sputtering, and characterized structurally mainly by x-ray diffraction and reflectivity. READ MORE

  7. 5. Self-assembly of magnetic particles

    Author : Hauke Carstensen; Max Wolff; Vassilios Kapaklis; Björgvin Hjörvarsson; Benjamin Yellen; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; self-assembly; tunable interactions; phase transition; ferrofluid; Fysik; Physics;

    Abstract : Self-assembly is the spontaneous formation of larger structures from small building blocks. This process is driven and determined by the interactions between the constituents. READ MORE