Abstract
We present results on the nonlinear dynamics of a realistic classical easy-plane ferromagnetic chain in an external magnetic field, concerning in particular the dependence of soliton solutions on the strength of the single-ion anisotropy. After giving two exact static solutions, slowly moving permanent profile solutions are investigated. The velocity dependent contribution to the energy as well as the amplitude of the out-of-plane distortion of these solutions is shown to diverge when the Magyari-Thomas-Kumar instability of the static Sine-Gordon soliton is approached. The dynamic origin of this instability is shown to be an unstable behaviour of the soliton towards spontaneous motion instead of a soft mode.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Mikeska, H.J.: J. Appl. Phys.52, 1950 (1981)
Mikeska, H.J.: Phys. Rev. B26, 5213 (1982)
Magyari, E., Thomas, H.: Phys. Rev. B25, 531 (1982)
Kumar, P.: Phys. Rev. B25, 483 (1982)
Kumar, P.: Physica D5, 359 (1982)
Akhiezer, I.A., Borovik, A.E.: JETP25, 885 (1967)
Osano, K.: (to be published)
Riseborough, P.S., Mills, D.L., Trullinger, S.E.: J. Phys. C14, 1109 (1981)
Mikeska, H.J.: Physica (in press)
Etrich, C., Mikeska, H.J.: J. Phys. C-Solid State Phys. (in press)
Allroth, E., Mikeska, H.J.: Z. Phys. B-Condensed Matter43, 209 (1981)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Mikeska, H.J., Osano, K. Dynamics of the soliton instability in the easy-plane ferromagnetic chain. Z. Physik B - Condensed Matter 52, 111–116 (1983). https://doi.org/10.1007/BF01445291
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01445291