IC/2001/106 United Nations Educational Scientific and Cultural organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS DIPOLAR EFFECTS ON SOLITON DYNAMICS ON A DISCRETE FERROMAGNETIC CHAIN

Abstract

Contributions of dipole-dipole interactions to the dynamics of solitons and specific heat on a one-dimensional (ID) discrete easy-plane Heisenberg ferromagnet in which the biquadratic exchange interactions are taken into account in addition to the Zeeman energy, the uniaxial anisotropy and the exchange energy are studied numerically. Results of a numerical simulation of the dynamics of a single soliton as well as collision between a soliton-antisoliton pair indicated that the energy-velocity curves for the solitons in the ferromagnetic chain present, the signature of five different branches corresponding to different types of nonlinear elementary excitations in the chain. Soliton contributions to the specific heat have been also analyzed with the equilibrium spin configurations determined by an importance sampling of the Monte Carlo method. MIRAMARE TRIESTE August 2001 1 Junior Associate of the Abdus Salam ICTP. E-mail: nguenang@yahoo.com; jpnguen@uycdc.uninet.cm

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Cite this paper

@inproceedings{Nguenang2005IC2001106UN, title={IC/2001/106 United Nations Educational Scientific and Cultural organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS DIPOLAR EFFECTS ON SOLITON DYNAMICS ON A DISCRETE FERROMAGNETIC CHAIN}, author={Jean-Pierre Nguenang and Aurelien Jiotsa Kenfack}, year={2005} }