TY  - JOUR
AU  - Andreas, Christian
AU  - Kákay, Attila
AU  - Hertel, Riccardo
TI  - Multiscale and multimodel simulation of Bloch-point dynamics
JO  - Physical review / B
VL  - 89
IS  - 13
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-04172
SP  - 134403
PY  - 2014
AB  - We present simulation results on the structure and dynamics of micromagnetic point singularities with atomistic resolution. This is achieved by embedding an atomistic computational region into a standard micromagnetic algorithm. Several length scales are bridged by means of an adaptive mesh refinement and a seamless coupling between the continuum theory and a Heisenberg formulation for the atomistic region. The code operates on graphical processing units and is able to detect and track the position of strongly inhomogeneous magnetic regions. This enables us to reliably simulate the dynamics of Bloch points, which means that a fundamental class of micromagnetic switching processes can be analyzed with unprecedented accuracy. We test the code by comparing it with established results and present its functionality with the example of a simulated field-driven Bloch-point motion in a soft-magnetic cylinder.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000333760500002
DO  - DOI:10.1103/PhysRevB.89.134403
UR  - https://juser.fz-juelich.de/record/201878
ER  -