Search for dissertations about: "thin magnetic films"

Showing result 16 - 20 of 115 swedish dissertations containing the words thin magnetic films.

2. 16. Functional Metallic Glasses

   Author : Ansar Masood; Lyubov Belova; K. Venkat Rao; Lars Arnberg; KTH; []
   Keywords : Bulk Metallic glasses; glass forming ability; soft magnetism; thin films; magnetic properties; magnetic hardening; plasticity; biocompatibility;

   Abstract : For decades, Metallic Glass, with its isotropic featureless structure while exhibiting outstanding mechanical properties was possible only at a high rate of quenching and with at least one dimension in the submicron regime.  This limitation was overcome with the discovery of Bulk Metallic glasses, BMGs, containing three or more elements following the additional two empirical rules of optimum geometric size differences and negative energy of mixing among the constituent elements. READ MORE

4. 17. Magnetic Ordering in Layered Magnets

   Author : Moreno Marcellini; Björgvin Hjörvarsson; Roger C.C Ward; Uppsala universitet; []
   Keywords : Physics; Magnetic thin films and superlattices; Magnetic phase transitions; Polarized neutron reflectometry; Fysik;

   Abstract : The preparation of layered magnets needs the knowledge of growth techniques which are focused on the growth of Fe/V(001) superlattices. Such films have been structurally investigated by X-rays reflectivity and diffraction. READ MORE

5. 18. Magnetism in Band Gap Engineered Sputtered MgxZn(1-x)O Thin Films

   Author : Sreekanth Mahadeva; K Venkat Rao; Lyubov Belova; Mark Fox; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Magnetron co-sputtering; MgO; MgxZn 1-x O; MnxMg 1-x O; thin films; Room-temperature ferromagnetism; band gap engineering; and intrinsic defects;

   Abstract : This dissertation presents a comprehensive study of the intrinsic room temperature ferromagnetism, RTFM, in technologically important thin films of ZnO, MgO, Mg@ZnO, the so-called d0–magnets that do not contain any intrinsic magnetic elements. We also present the first report on magnetism in Mn doped MgO films fabricated by dc magnetron sputtering. READ MORE

6. 19. Electro-Optical Na0.5K0.5NbO3 Films

   Author : Mats Blomqvist; Alexander M. Grishin; Prof. Bruce Wessels; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Functional materials; ferroelectrics; sodium potassium niobates; thin films; rf-magnetron sputtering; waveguiding; refractive index; prism-coupling; electro-optic effects; dielectric tunability; Funktionella material; Functional materials; Funktionella material;

   Abstract : Ferroelectric oxides are a group of advanced electronic materials with a wide variety of properties useful in applications such as memory devices, resonators and filters, infrared sensors, microelectromechanical systems, and optical waveguides and modulators.Among the oxide perovskite-structured ferroelectric thin film materials, sodium potassium niobate or Na0. READ MORE

7. 20. Growth of high quality Fe thin films : A study of the effect of mismatch strain on the physical properties of Fe

   Author : Anna Lena Ravensburg; Vassilios Kapaklis; Björgvin Hjörvarsson; Tomas Kubart; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; thin film growth; crystal quality; strain; magnetism; electronic transport; Fysik; Physics;

   Abstract : The work in this licentiate is devoted to investigating the epitaxial growth of thin Fe layers on MgAl2O4 (001) and MgO (001) substrates using dc magnetron sputtering. The aim is to qualitatively and quantitatively determine the crystal quality of the grown Fe layers depending on their thickness, substrate material, and selected deposition parameters. READ MORE