Spintronics, an abbreviation of spin based electronics and also known as
magneto electronics, has attracted a lot of interest in recent years. It aims to explore the
role of electrons’ spins in building next generation electric devices. Using electrons’
spins rather than electrons’ charges may allow faster, lower energy cost devices. Spin
Hall Effect is an important subfield of spintronics. It studies spin current, spin transport,
and spin accumulation in paramagnetic systems. It can further understanding of
quantum physics, device physics, and may also provide insights for spin injection, spin
detection and spin manipulation in the design of the next generation spintronics
devices.
In this experimental work, two sets of experiments were prepared to detect the
Spin Hall Effect in metallic systems. The first set of experiments aims to extract Spin
Hall Effect from Double Hall Effect in micrometer size metal thin film patterns. Our
experiments proved that the Spin Hall Effect signal was much smaller than the theoretically calculated value due to higher electrical resistivity in evaporated thin
films. The second set of experiments employs a multi-step process. It combines micro
fabrication and electrochemical method to fabricate a perpendicular ferromagnet rod as
a spin injector. Process description and various techniques to improve the measurement
sensitivity are presented. Measurement results in aluminum, gold and copper are
presented in Chapters III, IV and V. Some new experiments are suggested in Chapters
V and VI.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2364 |
| Date | 15 May 2009 |
| Creators | Xu, Huachun |
| Contributors | Teizer, Winfried |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | electronic, application/pdf, born digital |
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