Essays about: "magnetic vortex"

Showing result 6 - 10 of 11 essays containing the words magnetic vortex.

  1. 6. Dynamics of magnetic nanostructures

    University essay from Uppsala universitet/Materialfysik

    Author : Julia Liljestrand; [2016]
    Keywords : Spin ice; Micromagnetism; Simulations;

    Abstract : Magnetic nanostructures provide the opportunity to investigate a number ofmagnetic phenomena, and are of interest for their possible future applicationsin technology. In this project, the ferromagnetic response (FMR) of magnetic nanostructures to an electromagnetic excitation has been investigated using the micromagnetic simulations program Mumax3. READ MORE

  3. 7. Detection of electron vortex beams : Using a scanning transmission electron microscope

    University essay from Uppsala universitet/Materialteori

    Author : André Löfgren; [2015]
    Keywords : microscopy; electron; vortex; beam; microscope; detection; detecting; doughnuts; microscopy; STEM; scanning; transsmision; mikroskopi; elektronvirvelstråle; elektronvirvelstrålar; elektron; stråle; virvel; munk; munkar; elektrontransmissionsmikroskop; elektronmikroskop; transmissionsmikroskop; detektera; detektering;

    Abstract : Electron vortex beams (EVBs) are electron beams with a doughnut-like intensity profile, carrying orbital angular momentum due to their helical phase shift distribution. When employed in an electron microscope, they are expected to be efficient for the detection of magnetic signals. READ MORE

  4. 8. Study of Magnetic Nanostructures using Micromagnetic Simulations and Monte Carlo Methods

    University essay from Uppsala universitet/Materialfysik

    Author : Nils Bäckström; Jonathan Löfgren; Vilhelm Rydén; [2014]
    Keywords : frustration; magnets; spin ice; hysteresis; monte carlo; simulation; vortex; micromagnetics; metropolis;

    Abstract : We perform micromagnetic simulations in MuMax3 on various magneticnanostructures to study their magnetic state and response to external fields. Theinteraction and ordering of nanomagnetic arrays is investigated by calculating themagnetostatic energies for various configurations. READ MORE

  5. 9. Analysis of vortex movement in an YBCO thin film : Models of the vortex solid-to-liquid transition compared to a sensitive resistive measurement of a strongly pinned YBCO thin film

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Alex Ellgren; [2013]
    Keywords : High-temperature superconductor; YBCO; vortex dynamics; glass transition; vortex glass; vortex molasses;

    Abstract : When a high-temperature superconductor transitions in the presence of a magnetic field, the resistance does not immediately go to zero. Instead, the transition is smoothed by the resistive effects of moving vortices so that perfect conductivity isn't reached until several K below Tc, where the vortices have frozen into a glass state. READ MORE

  6. 10. The glass transition in high-temperature superconductors

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Peter Berglund; [2010]
    Keywords : ;

    Abstract : In high-temperature superconductors a large region of the magnetic phase diagram is occupied by a vortex phase. This vortex phase can be divided into two regions. At lower temperatures the vortices are in a truly superconducting solid phase. At higher temperatures the solid changes to a dissipative vortex liquid. READ MORE