Search for dissertations about: "triangular features"

Showing result 1 - 5 of 8 swedish dissertations containing the words triangular features.

  2. 1. Nanospintronics with Molecular Magnets - Tunneling and Spin-Electric Coupling

    Author : Javier Francisco Nossa Márquez; Fasta tillståndets fysik; []
    Keywords : Molecular magnets; spin exchange; spin-orbit interaction; magnetic anisotropy; spin frustration; spin chirality; spin-electric control; quantum transport; Coulomb blockade; density functional theory; quantum master equation.;

    Abstract : This dissertation investigates theoretically electric control of the magnetic properties of molecular magnets. Two classes of magnetic molecules are considered. The first class consists of molecules that are spin frustrated. READ MORE

  4. 2. Correlations in Frustrated Magnets : Classical and Quantum Aspects

    Author : Sergei Isakov; Anders Karlhede; Frederic Mila; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Abstract : In this thesis, we study three different aspects of the physics of frustrated magnets. First, we study the interplay of thermal and quantum fluctuations in the transverse field frustrated Ising model on the triangular lattice. READ MORE

  5. 3. Robust Preconditioners Based on the Finite Element Framework

    Author : Erik Bängtsson; Maya Neytcheva; Per Lötstedt; Svetozar Margenov; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; FEM; iterative solution method; algebraic multilevel preconditioner; sparse approximate inverse; block preconditioner; Schur complement approximation; nonsymmetric saddle point matrix; isostatic glacial adjustment; pre-stress advection; elasticity; viscoelasticity; in compressible solid; ABAQUS; BEM DDM; Scientific Computing; Beräkningsvetenskap;

    Abstract : Robust preconditioners on block-triangular and block-factorized form for three types of linear systems of two-by-two block form are studied in this thesis. The first type of linear systems, which are dense, arise from a boundary element type of discretization of crack propagation problems. READ MORE

  6. 4. Interfacial colloidal particle films and their structure formation

    Author : Sandra Rödner; KTH; []
    Keywords : crystallisation; colloids; structure; monolayer; evaporation; salt;

    Abstract : Abstract to“Interfacial colloidal particle films andtheir structure formation”; a licentiate thesis, whichwill be presented by Sandra Rödner in Q2, 29 November 2002at 13.00.Colloidal particles can be made to organise themselves intoordered arrays. READ MORE

  7. 5. Magnetic frustration and low-dimensional magnetism : in transition metal fluorophosphates and square-lattice intermetallic compounds

    Author : Stefanie Siebeneichler; Anja-Verena Mudring; Ulrich Häussermann; Sven Lidin; Kenneth R. Poeppelmeier; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; magnetic frustration; low-dimensional magnetism; ionothermal synthesis; powder neutron diffraction; fluorophosphates; intermetallics; Physical Chemistry; fysikalisk kemi;

    Abstract : Solids can display a variety of vastly different magnetic properties. Besides the generally well known ferromagnets, antiferromagnets with their antiparallel arrangements of magnetic moments can exhibit a wide range of complex magnetic behavior such as magnetic frustration or low-dimensional antiferromagnetism. READ MORE