Eur. Phys. J. B (2012) 85: 133
https://doi.org/10.1140/epjb/e2012-20704-4

Regular Article

Kinetics of precessing ball solitons in ferromagnets at the first-order transition

Joint Institute for Nuclear Research, Dubna, 141980 Moscow Region, Russia

^a e-mail: nietz@jinr.ru

Received: 26 August 2011
Received in final form: 11 December 2011
Published online: 24 April 2012

Abstract

The fundamentals of precessing ball solitons (PBS) arising as a result of the energy fluctuations at the first-order phase transition induced by a magnetic field in ferromagnets with uniaxial anisotropy are presented. When the external magnetic field is anti-parallel to the magnetization direction of the crystal, PBS states are possible in a wide range of amplitudes and energies, including the positive and negative energies relative to an initial condition. PBS are born with the greatest probability at near-zero energy, i.e. near the bifurcation point. Evolution of the PBS, at which they transform into macroscopic domains of a new magnetic phase or into a quasi-equilibrium solitonic state, is analysed.