Spin torque on magnetic domain walls exerted by supercurrents

. We calculate the spin density, spin currents and spin torque due to a spin polarized current on a magnetic domain wall juxtaposed to or inserted in a conventional superconductor. The superconductor is part of a heterostructure of the type NSN or FSF. In general, the spin torque exerted on the doma...

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Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2010-07, Vol.76 (2), p.251-259
Main Authors: Sacramento, P. D., Araújo, M. A.N.
Format: Article
Language:English
Subjects:
Complex Systems
Condensed Matter Physics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Electronic transport in condensed matter
Exact sciences and technology
Fluid- and Aerodynamics
Multilayers, superlattices , heterostructures
Physics
Physics and Astronomy
Solid State and Materials
Solid State Physics
Spin polarized transport
Superconducting films and low-dimensional structures
Superconductivity
Superconductors
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Summary:. We calculate the spin density, spin currents and spin torque due to a spin polarized current on a magnetic domain wall juxtaposed to or inserted in a conventional superconductor. The superconductor is part of a heterostructure of the type NSN or FSF. In general, the spin torque exerted on the domain wall is weaker with respect to a normal metal. However, there are regimes where the torque is enhanced with respect to the normal metal. In these regimes the motion of the domain wall is therefore more efficient. A notable case is the passing of an unpolarized current which leads to a finite torque in the case of the superconductor.
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/e2010-00178-2