Search for dissertations about: "classical Heisenberg Hamiltonian"
Found 3 swedish dissertations containing the words classical Heisenberg Hamiltonian.
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1. Influence of Global Composition and Local Environment on the Spectroscopic and Magnetic Properties of Metallic Alloys
Abstract : Theoretical investigations of spectroscopic and magnetic properties of metallic systems in the bulk, as well as in nanostructured materials, have been performed within the density functional theory. The major part of the present work studies the differences between binding energies of electrons tightly bound to the atoms, the so-called core electrons (in contrast with the valence electrons), that is, core-level binding energy shift (CLS). READ MORE
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2. Spin Dynamics and Magnetic Multilayers
Abstract : Theoretical studies based on first-principles theory are presented for a number of different magnetic systems. The first part of the thesis concerns spin dynamics and the second part concerns properties of magnetic multilayers. The theoretical treatment is based on electronic structure calculations performed by means of density functional theory. READ MORE
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3. First-principles study of spin-flip transition in Fe-Ni invar alloys
Abstract : More than a hundred years ago, Guillaume discovered that the alloy Fe65Ni35, at equilibrium under normal pressure, was invar. Indeed, its thermal expansion coefficient was anomalously small over a wide temperature interval. It is now known that the invar effect in this alloy is related to magnetism. READ MORE
