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Hittade 2 uppsatser som matchar ovanstående sökkriterier.

1. 1. Best practice of extracting magnetocaloric properties in magnetic simulations

   Master-uppsats, Uppsala universitet/Materialteori

   Författare :Johan Bylin; [2019]
   Nyckelord :Magnetocaloric effect; Thermodynamics; Statistical mechanics; Monte Carlo simulations; Metropolis algorithm; Wang-Landau method; Isothermal change in entropy; Adiabatic change in temperature; Numerical methods; Effective spin models;

   Sammanfattning : In this thesis, a numerical study of simulating and computing the magnetocaloric properties of magnetic materials is presented. The main objective was to deduce the optimal procedure to obtain the isothermal change in entropy of magnetic systems, by evaluating two different formulas of entropy extraction, one relying on the magnetization of the material and the other on the magnet's heat capacity. LÄS MER

3. 2. Analysis of a spin-particle tunnelling junction

   Kandidat-uppsats, Uppsala universitet/Materialteori

   Författare :Johan Bylin; [2015]
   Nyckelord :Spin Molecules Energy Spectrum;

   Sammanfattning : This project is to analyse the energy spectrum of a spin-molecular tunnelling junction which is composed of molecules confined between two conducting metallic leads. By letting a continuous stream of electrons flow across the junction the molecules can interact with each other with an indirect force called exchange interaction, and those exchange interactions which are of interest in this project are described by models called the Heisenberg, the Ising and the Dzyaloshinski-Moriya models. LÄS MER