@Article{CiCP-20-969,
author = {Mikhail Poluektov, Olle Eriksson and Gunilla Kreiss},
title = {Scale Transitions in Magnetisation Dynamics},
journal = {Communications in Computational Physics},
year = {2018},
volume = {20},
number = {4},
pages = {969--988},
abstract = {<p style="text-align: justify;">Multiscale modelling is a powerful technique, which allows for computational
efficiency while retaining small-scale details when they are essential for understanding
a finer behaviour of the studied system. In the case of materials modelling,
one of the effective multiscaling concepts is domain partitioning, which implies
the existence of an explicit interface between various material descriptions, for
instance, atomistic and continuum regions. When dynamic material behaviour is considered,
the major problem for this technique is dealing with reflections of high frequency
waves from the interface separating two scales. In this article, a new method
is suggested, which overcomes this problem for the case of magnetisation dynamics.
The introduction of a damping band at the interface between scales, which absorbs
high frequency waves, is suggested. The idea is verified by using a number of one-dimensional
examples with fine/coarse scale discretisation of a continuum problem
of spin wave propagation. This work is the first step towards establishing a reliable
atomistic/continuum multiscale transition for the description of the evolution of magnetic
properties of ferromagnets.</p>},
issn = {1991-7120},
doi = {https://doi.org/10.4208/cicp.120615.090516a},
url = {http://global-sci.org/intro/article_detail/cicp/11179.html}
}