Table of Contents
Physics Research International
Volume 2011, Article ID 643738, 8 pages
http://dx.doi.org/10.1155/2011/643738
Research Article

Precessing Ball Solitons in Kinetics of a Spin-Flop Phase Transition

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

Received 25 April 2011; Accepted 17 May 2011

Academic Editor: Frank Tsui

Copyright © 2011 V. V. Nietz. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The fundamentals of precessing ball solitons (PBS), arising as a result of the energy fluctuations during spin-flop phase transition induced by a magnetic field in antiferromagnets with uniaxial anisotropy, are presented. The PBS conditions exist within a wide range of amplitudes and energies, including negative energies relative to an initial condition. For each value of the magnetic field, there exists a precession frequency for which a curve of PBS energy passes through a zero value (in bifurcation point), and hence, in the vicinity of this point the PBS originate with the highest probability. The characteristics of PBS, including the time dependences of configuration, energy, and precession frequency, are considered. As a result of dissipation, the PBS transform into the macroscopic domains of a new phase.