Magnetization reversal in spin patterns with complex geometry

Details Magnetization reversal in spin patterns with complex geometry Magnetization reversal in spin patterns with complex geometry

2004-11-09

arxiv.org/abs/cond-mat/0411223v1

Phys. Rev. Lett. 94 (2005) 137204

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 color figures, revtex4

Scientific paper

10.1103/PhysRevLett.94.137204

We study field-driven dynamics of spins with antiferromagnetic interaction along the links of a complex substrate geometry, which is modeled by graphs of a controlled connectivity distribution. The magnetization reversal occurs in avalanches of spin flips, which are pinned by the topological constraints of the underlying graph. The hysteresis loop and avalanche sizes are analyzed and classified in terms of graph's connectivity and clustering. The results are relevant for magnets with a hierarchical spatial inhomogeneity and for design of nanoscale magnetic devices.

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