Search for dissertations about: "thin wires"

Showing result 1 - 5 of 20 swedish dissertations containing the words thin wires.

  2. 1. Hybrid Solvers for the Maxwell Equations in Time-Domain

    Author : Fredrik Edelvik; Per Lötstedt; Jan Hesthaven; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Maxwell s equations; time-domain; finite volume methods; finite element methods; hybrid solver; dispersive materials; thin wires; Beräkningsvetenskap; Scientific Computing;

    Abstract : The most commonly used method for the time-domain Maxwell equations is the Finite-Difference Time-Domain method (FDTD). This is an explicit, second-order accurate method, which is used on a staggered Cartesian grid. The main drawback with the FDTD method is its inability to accurately model curved objects and small geometrical features. READ MORE

  4. 2. Tailored Properties of Ferromagnetic Thin Films

    Author : Peter Warnicke; Peter Svedlindh; Peter Grünberg; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; micromagnetics; domain wall; vortex; pinning potential; nanowire; spin dynamics; spin transfer torque; magnetic anisotropy; MFM; Permalloy; PMA; magnetic multilayer; Curie temperature; DMS; GaMnAs; magnetic bioseparation; Engineering physics; Teknisk fysik;

    Abstract : Magnetic thin films and patterned nanostructures have been studied with respect to their magnetic properties using SQUID-magnetometry, magnetic force microscopy, electrical measurements, and micromagnetic calculations. Properties of vortex domain walls, trapped in Permalloy nanowires with artificial constrictions, were investigated experimentally and by numerical calculations. READ MORE

  5. 3. Transport phenomena in quantum wells and wires in presence of disorder and interactions

    Author : Valeria Vettchinkina; Matematisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; time-dependent density-functional theory; disorder; electron correlation; Lowdimensional semiconducting systems; transport phenomena; Fysicumarkivet F:2012:Vettchinkina;

    Abstract : Present-day electronics employ circuits of smaller and smaller dimensions, and today the length scales are so small that the laws of physics which rule micro-cosmos, quantum mechanics, become directly important. This thesis reports on theoretical work on electron transport in different nanostructures. READ MORE

  6. 4. Use of EBSD Technique as a Means to Investigate the Microstructure of Engineering Materials

    Author : Muhammad Umar Farooq; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; laser cladding; coronary stents.; strain induced phase transformation; EBSD; oligocrystalline structures; WC-Co;

    Abstract : AbstractMaterials Science and Engineering has the aim to design or engineer the structure of a material to produce a predetermined set of properties. To be able to understand and predict the properties and observable characteristics of engineering materials, it is therefore necessary to understand their microstructure. READ MORE

  7. 5. Atomistic studies of nano-structural mechanical behavior and point defects

    Author : Pär Olsson; Mekanik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : The content of this thesis consists of two parts. For the first part, size and crystallographic orientational influence on the elastic properties of bcc nanowires and films have been studied through static molecular simulations. In order to explicitly account for surface effects, the concept of surface free energy has been employed. READ MORE