97 research outputs found
Analytical approximations to the core radius and energy of magnetic vortex in thin ferromagnetic disks
The energy of magnetic vortex core and its equilibrium radius in thin
circular cylinder were first presented by N.A. Usov and S.E. Peschany in 1994.
Yet, the magnetostatic function, entering the energy expression, is hard to
evaluate and approximate. In this communication precise and explicit analytical
approximations to this function (as well as equilibrium vortex core radius and
energy) are derived in terms of elementary functions. Also, several simplifying
approximations to the magnetic Hamiltonian and their impact on theoretical
stability of magnetic vortex state are discussed.Comment: 5 pages, 1 figur
Nonequilibrium evolution thermodynamics
A new approach - nonequilibrium evolution thermodynamics, is compared with
classical variant of Landau approachComment: 4 pages, 1 figur
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