Vortex core scattering and pinning by impurities in nanomagnets
作者： D. Toscano , S. A. Leonel , R. A. Dias , P. Z. Coura , B. V. Costa
DOI: 10.1063/1.3573518
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摘要: The dynamical behavior of a magnetic nanoparticle contaminated by pointlike impurities is studied using spin dynamics numerical simulation. It was observed that the can behave both as pinning (attractive) and scattering (repulsive) sites. A Gaussian profile for interaction potential energy ranging up to two lattice parameters. Using known values parameters Permalloy-79 we have calculated vortex core with single defect. We estimated range approximately 10nm. Both results agree quite well experimental measurements.
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