Senior Theses
This thesis has been designated as Linfield Access only. It is available only to members of the Linfield community with a valid CatNet ID and password. We apologize for any inconvenience this might cause.
Off-campus Linfield users: To download this thesis, please click the button for Off-Campus Download (Linfield users only).
Non-Linfield University users: Please talk to your local librarian about requesting this thesis through interlibrary loan.
Publication Date
5-2013
Document Type
Thesis (Linfield Access)
Degree Name
Bachelor of Arts in Physics
Department
Physics
Faculty Advisor(s)
Michael Crosser (Thesis Advisor)
Joelle Murray & Donald Schnitzler (Committee Members)
Subject Categories
Physics
Abstract
The application of spintronics (spin-electronics) requires highly optimized devices. We aim to understand spin transport and its dependence on film thickness so that the geometry of the device can be improved. This experiment investigates how the thickness of the sample affects the propagation of spin current (SC). Additionally we aim to reduce the effects from spin accumulation and reflection by the addition of a FeMn spin sink layer. Two series of sample multilayers are sputtered onto sapphire substrate. The first consists of Pt (d nm), and Permalloy (Py) (5 nm), where d is the variable thickness; the second series adds FeMn (0.5 nm) beneath Pt. SC is then induced by the Spin Hall Effect (SHE) where the effect on Py is measured by Brillouin Light Scattering (BLS) spectroscopy. Our data show the effects of SC increase inversely proportional to sample thickness and the addition of a spin sink layer improves these effects to a certain point where unexpected behavior occurs at d ¡ 3nm.
Recommended Citation
Melander, Josh R., "Optimization of Platinum-Based Spin-Hall-Effect Spintronic Devices" (2013). Senior Theses. 5.
https://digitalcommons.linfield.edu/physstud_theses/5
