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Andreev Reflection Spectroscopy: Theory and Experiment


Abstract A theoretical study of a three-dimensional (3D) N/S interface with arbitrary spin

polarization and interface geometry is presented. The 3D model gives the same intrinsic

spin polarization and superconducting gap dependence as the 1D model. This

demonstrates that the 1D model can be use to t 3D data.

Using this model, a Heusler alloy is investigated. Andreev reflection measurements

show that the spin polarization is 80% in samples sputtered on unheated MgO(100)

substrates and annealed at high temperatures. However, the spin polarization is

considerably smaller in samples deposited on heated substrates.

Ferromagnetic FexSi􀀀x alloys have been proposed as potential spin injectors into

silicon with a substantial spin polarization. Andre... (more)
Created Date 2015
Contributor Gifford, Jessica Anna (Author) / Chen, Tingyong (Advisor) / Bennett, Peter (Committee member) / Nemanich, Robert (Committee member) / Tsen, Kong-Thon (Committee member) / Arizona State University (Publisher)
Subject Condensed matter physics / Physics / Andreev Reflection / Giant Magnetoresistance / Spin Polarization / Spintronics / Superconducting gap / Superconductivity
Type Doctoral Dissertation
Extent 255 pages
Language English
Copyright
Reuse Permissions All Rights Reserved
Note Doctoral Dissertation Physics 2015
Collaborating Institutions Graduate College / ASU Library
Additional Formats MODS / OAI Dublin Core / RIS


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Description Dissertation/Thesis