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Domain Walls in Spin Valve Nanotracks: Characterisation and Applications by Sampaio, Joao is a scholarly article available to read on EtoBox.

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Magnetic systems based on the manipulation of domain walls (DWs) in nano-tracks have been shown to store data at high density, perform complex logic operations, and mechanically manipulate magnetic beads. The magnetic track has been a model system to study magnetic and magneto-electronic phenomena, such as field induced DW propagation and spin-transfer torque. This thesis focuses on DW manipulation and DW-based devices in spin-valve (SV) tracks. In comparison to monolayer tracks, the SV track enables more sensitive and versatile measurements, as well as an electronic output of DW-based devices, of crucial interest to applications. However, these multi-layered tracks add new, potentially disruptive magnetic interactions, as well as fabrication challenges. In this thesis, the DW propagation in SV tracks of different compositions was studied, and a system with DW propagation properties comparable to the state-of-the-art in monolayer tracks was demonstrated, down to an unprecedented lateral size of 33nm. Several logic devices were demonstrated and studied, namely a turn-counting DW spiral, a DW gate, DW logic NOT gates, and a DW-DW interactor. It was found that the magnetic behaviour o

Author

Sampaio, Joao

Published

2013

Language

EN