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Title: Spin injection from magnetic thin films into InGaAs quantum wells
Author: Hickey, M. C.
Awarding Body: University of Cambridge
Current Institution: University of Cambridge
Date of Award: 2006
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The injection of spin polarised electrons is a fundamental challenge in the emergent field of spin electronics and is a prerequisite for the readout and initialisation for a spin qubit. This work is an investigation into spin injection from magnetic thin film contacts into (100) GaAs/InGaAs quantum wells as a function of energy, magnetic field, applied bias and temperature. The spin injection efficiency is derived from optical polarisation measurements in the oblique Hanle geometry. The Heusler alloy Co2MnGa is investigated as a potential spin injector and is compared directly with Fe on the same III-V device substrate. Ab-initio methods are used to investigate the spin polarised electronic band structure of some of these half-metallic alloys – in particular Co2 TiSn.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available