Abstract
The spin transport signals from NiFe and Co into two-dimensional electron gas layers are measured for various thicknesses of transmission barriers. A stable and reproducible electrical detection of spin transport was obtained only when the barrier thickness is less than 10 nm. The typical interface resistance to observe spin signals in this experiment is about 0.5-250 Ω, which is a neither transparent nor a severe tunneling limit. The optimal interface resistance depends on the ferromagnetic materials, but severe tunneling barrier is not proper for fully electrical spin transport. Device size is also a critical factor to decide the proper range of interface resistance.
Original language | English |
---|---|
Pages (from-to) | 1436-1439 |
Number of pages | 4 |
Journal | Journal of Magnetism and Magnetic Materials |
Volume | 320 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2008 Apr |
Externally published | Yes |
Keywords
- Interface resistance
- Spin transport
- Two-dimensional electron gas
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics