Essays about: "spin ice"

Showing result 1 - 5 of 11 essays containing the words spin ice.

1. 1. Probing magnetic Dynamics inNanoarrays using AC susceptibility

   University essay from Uppsala universitet/Materialfysik

   Author : Tobias König; [2020]
   Keywords : ;

   Abstract : This project revised a magneto-optical ac susceptometer aiming to improve the experimentalapproach to investigate the magnetization dynamics of magnetic nano arrays.First the experimental setp was equipped with a new Helmholtzcoil which enables strongerAC magnetic eld compared to the installed coils on the system. That includes i.e. READ MORE

3. 2. 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

4. 3. Investigation of articial spin ice structures employingmagneto-optical Kerr effect for susceptibility measurements

   University essay from Uppsala universitet/Materialfysik

   Author : Agne Ciuciulkaite; [2015]
   Keywords : artificial spin ice; magnetic susceptibility; magneto-optical Kerr effect;

   Abstract : Articial spin ice structures are two-dimensional systems of lithographically fabricated lattices ofelongated ferromagnetic islands, which interact via dipolar interaction. These systems have beenshown to be a suitable playground to study the magnetic, monopole-like, excitations, similar tothose in three-dimensional rare-earth pyrochlores. READ MORE

5. 4. Magnetic Monopole Current in Artificial Square Spin Ice

   University essay from KTH/Skolan för teknikvetenskap (SCI)

   Author : Oscar Eriksson; Kaj Dahl; [2014]
   Keywords : ;

   Abstract : Recent theoretical and experimental results have revealed the existence of magnetic monopoles, in the form of quasi particles, in both condensed matter known as spin ice, as well as in two-dimensional artificial versions of the same material. In this report a two-dimensional Ising model is first examined, then an artificial square spin ice model using a dipole approximation, only taking into account nearest and next nearest neighbors. READ MORE

6. 5. 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