Title :
A model for Lorentz microscopy and magnetic behaviour of longitudinal thin film with an irregular lattice
Author :
Walmsley, N.S. ; Dean, C. ; Hart, A. ; Parker, D.A. ; Chantrell, R.W.
Author_Institution :
Dept. of Math. & Stat., Univ. of Central Lancashire, Preston, UK
fDate :
11/1/1994 12:00:00 AM
Abstract :
Lorentz microscopy is an important experimental technique currently being used to investigate magnetic microstructures found in longitudinal thin films. Micromagnetic models of thin films have previously been based on regular hexagonal lattices; a Monte-Carlo algorithm has been developed which produces an irregular structure with a grain size distribution. We model Lorentz microscopy by integrating the in-plane components of the stray field along a straight line trajectory. The effects of packing fraction and structure regularity on the remanence and coercivity values are discussed; we show that regularity has a qualitative effect on the simulated Lorentz images of coercive states
Keywords :
Monte Carlo methods; coercive force; electron microscopy; magnetic thin films; remanence; Lorentz microscopy; Monte-Carlo algorithm; coercivity; irregular lattice; longitudinal thin film; magnetic microstructures; packing fraction; remanence; structure regularity; Electron beams; Grain size; Lattices; Lorentz covariance; Magnetic films; Magnetic force microscopy; Mathematical model; Micromagnetics; Physics; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
