Precessing ball solitons in kinetics of a spin-flop phase transition

TL;DR

This paper explores precessing ball solitons in antiferromagnets during spin-flop phase transitions, detailing their conditions, characteristics, and evolution into new phase domains.

Contribution

It introduces the fundamental properties and dynamics of precessing ball solitons during spin-flop transitions, including their energy conditions and bifurcation behavior.

Findings

PBS exist over a wide amplitude and energy range.

A bifurcation point exists where PBS energy passes through zero.

Dissipation causes PBS to transform into macroscopic phase domains.

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 (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.