Electronic Resource
Oxford, UK
:
Blackwell Publishing Ltd
Geophysical journal international
111 (1992), S. 0
ISSN:
1365-246X
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
Notes:
The behaviour of magnetic particles in a fluid and the accompanying net magnetization change are simulated using the Monte Carlo technique taking into account an effect of the magnetostatic interaction between particles. The simulated assembly consists of one hundred single-domain magnetites within a two-dimensional unit cell. A periodic boundary condition is used to calculate the magnetic field caused by interaction between adjacent particles. Dilute assemblies show a steady relaxation and acquisition patterns of magnetization, which are expected from analytical solutions of the non-interacting state. In contrast, concentrated assemblies show more complicated patterns. These patterns are consistent with the experimental results for suspensions with comparable concentrations. In the concentrated assemblies, it was also found that coagulation of particles occurs and that particle moments in a chain-like cluster are aligned along the chain's elongated direction. Coagulation of particles in the concentrated assembly modifies the net magnetization pattern through the dominance of the interacting field in a cluster. Thus magnetostatic interaction could play an important role in the behaviour of magnetic particles in a fluid. Numerical simulations of this type which incorporate other interaction effects have the potential to give insights into the process by which detrital remanent magnetization is acquired.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-246X.1992.tb00583.x
Permalink
|
Location |
Call Number |
Expected |
Availability |