Abstract
Effects of a single-atom impurity on a small vortex-like soliton are studied in the two-dimensional (2D) Heisenberg model of layered magnets. In the 41 x 41 spin lattice with exchange parameters corresponding to the 2D easy-plane copper ferromagnet and the easy-axis manganese antiferromagnet a vortex-like structure and its energy are calculated in the presence of a single nonmagnetic or magnetic impurity. It is found that the in-plane and out-of-plane vortices are attracted to and centered on the impurity in the easy-plane magnet up to the almost isotropic limit. Layered Cu-halide compounds are found to be good candidates for experimental observation of stable, fixed vortex-antivortex patterns.
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