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Spincurrent: Domain Walls and Spin-Polarized Currents

Titel Englisch Spincurrent: Domain Walls and Spin-Polarized Currents
Gesuchsteller/in Allenspach Rolf
Nummer 112377
Förderungsinstrument Projektförderung (spezial)
Forschungseinrichtung IBM Research GmbH
Hochschule Firmen/Privatwirtschaft - FP
Hauptdisziplin Andere Gebiete der Physik
Beginn/Ende 01.10.2006 - 30.06.2010
Bewilligter Betrag 307'574.00
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Keywords (4)

Spin polarization; domain wall; magnetic nanostructure; ferromagnetic semiconductor

Lay Summary (Englisch)

Lay summary
A domain wall is a naturally occurring magnetic nanostructure and in this proposal we are seeking funding to launch a wide ranging study of the interactions of domain walls in nanoscale magnetic devices with spin-polarised currents. There is a reciprocal relationship between these two objects: on the one hand, the domain wall may cause additional (or reduced) scattering of the spin-polarised electrons as they traverse it, giving rise to a change in resistance when the magnetisation is saturated to a single domain state and the wall is removed. On the other, as the electrons undergo this scattering their wavevector and/or spin state will change and the associated amount of linear or angular momentum is transferred to the wall, giving rise to a force or torque. This can cause current-induced wall motion. Both of these effects, as well as being of great scientific interest, are of substantial technological promise. In this project we aim to address a variety of questions related to spin polarised transport in metallic and semiconducting magnetic heterostructures form the persepctive of basic science, but always with an eye to technological exploitation. The main focus of our research will be to study the nucleation and propagation of magnetic domain walls, and their interactions with spin-polarised currents. This is currently a very timely field in which to be working as there are a number of untested theoretical predictions in the literature. To address these problems we have assembled a consortium of world-class scientists with diverse skills and epxertise. These include experimenters and theorists, as well as academics and industrial scientists, from across Europe.
Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

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