Artículo
Mobility of Bloch walls via the collective coordinate method
Fecha de publicación:
07/2000
Editorial:
American Physical Society
Revista:
Physical Review B: Condensed Matter and Materials Physics
ISSN:
1098-0121
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We have studied the problem of the dissipative motion of Bloch walls considering a totally anisotropic one-dimensional spin chain in the presence of a magnetic field. Using the so-called “collective coordinate method” we construct an effective Hamiltonian for the Bloch wall coupled to the magnetic excitations of the system. It allows us to analyze the Brownian motion of the wall in terms of the reflection coefficient of the effective potential felt by the excitations due to the existence of the wall. We find that for finite values of the external field the wall mobility is also finite. The spectrum of the potential at large fields is investigated and the dependence of the damping constant on temperature is evaluated. As a result we find the temperature and magnetic-field dependence of the wall mobility. © 2000 The American Physical Society.
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Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
Desposito, Marcelo Arnaldo; Villares Ferrer, A.; Caldeira, A. O.; Castro Neto, A. H.; Mobility of Bloch walls via the collective coordinate method; American Physical Society; Physical Review B: Condensed Matter and Materials Physics; 62; 2; 7-2000; 919-927
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