Dresden 2006 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 9: Poster I
HL 9.92: Poster
Montag, 27. März 2006, 15:15–17:45, P3
Magnetotransport properties and dynamics of domain wall in magnetic nanowires — •Jamal Berakdar1, V. K. Dugaev2, V. R. Vieira2, P. D. Sacramento2, J. Barnas3, and M. A. N. Araujo4 — 1Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany — 2Departamento de Física and CFIF, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal — 3Department of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland — 4Departamento de Física, Universidade de Évora, P-7000 Évora, Portugal
We investigate theoretically the magnetoresistance of semiconducting ferromagnetic nanowires with a laterally constrained domain wall . The wall is assumed to be sharp on the scale of the Fermi wavelength of the charge carriers. The role of the spin-orbit interaction of the Rashba type as well as the influence of impurity scattering are discussed. In addition, we discuss the current-induced dynamics of a magnetic domain wall and calculate the spin torque exterted by an electric current. We find the torque has two components: one component results in a translational motion of the domain wall while the other leads to a deformation of the domain-wall shape, forcing thus the magnetic moments to deviate from the easy plane.