Inhomogeneous States in a Small Magnetic Disk with Single-Ion Surface Anisotropy

Details Inhomogeneous States in a Small Magnetic Disk with Single-Ion Surface Anisotropy Inhomogeneous States in a Small Magnetic Disk with Single-Ion Surface Anisotropy

2002-11-14

arxiv.org/abs/cond-mat/0211265v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 7 figures; submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.68.104428

We investigate analytically and numerically the ground and metastable states for easy-plane Heisenberg magnets with single-ion surface anisotropy and disk geometry. The configurations with two half-vortices at the opposite points of the border are shown to be preferable for strong anisotropy. We propose a simple analytical description of the spin configurations for all values of a surface anisotropy. The effects of lattice pinning leads to appearance of a set of metastable configurations.

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