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Dynamic and static excitations of a classical discrete anisotropic Heisenberg ferromagnetic spin chain
Authors:M. Lakshmanan
Affiliation:a Centre for Nonlinear Dynamics, Department of Physics, Bharathidasan University, Tiruchirapalli 620 024, India
b Theoretical Division and Center for Nonlinear Studies, Los Alamos National Lab, Los Alamos, NM 87545, USA
Abstract:Using Jacobi elliptic function addition formulas and summation identities we obtain several static and moving periodic soliton solutions of a classical anisotropic, discrete Heisenberg spin chain with and without an external magnetic field. We predict the dispersion relations of these nonlinear excitations and contrast them with that of magnons and relate these findings to the materials realized by a discrete spin chain. As limiting cases, we discuss different forms of domain wall structures and their properties.
Keywords:Anisotropic Heisenberg ferromagnetic chain   Spin chain   Nonlinear excitations   Solitons   Peierls-Nabarro barrier
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