6533b822fe1ef96bd127cb1f
RESEARCH PRODUCT
Impurity effects on soliton dynamics in planar ferromagnets
Stéphane RocheMichel Peyrardsubject
PhysicsCondensed matter physicsScatteringGeneral Physics and Astronomysine-Gordon equationDissipative solitonMagnetic anisotropyNonlinear Sciences::Exactly Solvable and Integrable SystemsFerromagnetismImpurityCondensed Matter::Strongly Correlated ElectronsSolitonSome EnergyNonlinear Sciences::Pattern Formation and SolitonsComputer Science::Databasesdescription
Abstract We investigate numerically the dynamics of solitons in a ferromagnetic spin chain and we show that the sine-Gordon approximation provides only a poor description of the solitary excitations in the presence of impurities. Depending on their energy and the strength of the impurity, solitons can be reflected or transmitted. When they are reflected, they can suffer abrupt changes in velocity, which are associated to the switch from one soliton branch to another. In some cases the scattering by an impurity can excite an internal mode of the soliton, which is able to store some energy and modify the output of the scattering.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 | Physics Letters A |