Abstract
Magnetoresistance measurements of multi-walled carbon nanotubes having one or two ferromagnetic contacts are compared. Nanotubes with two cobalt contacts show hysteretic switching in the magnetoresistance, with a maximum change of 9% at 4.2 K, while nanotubes with one cobalt contact and one platinum/gold contact show no magnetoresistance switching. This provides further evidence for coherent transport of electron spin through the multi-walled nanotube. In addition, the magnetoresistance ratio in the ferromagnetic nanotube device is calculated for a two-band ballistic model, and gives a maximum value of 25%.
| Original language | English |
|---|---|
| Pages (from-to) | 499-504 |
| Number of pages | 6 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 10 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 2001 May 1 |
| Externally published | Yes |
Keywords
- Carbon nanotubes
- Ferromagnets
- Spin
- Spin eectronics
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
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Cite this
Alphenaar, B. W., Tsukagoshi, K., & Wagner, M. (2001). Magnetoresistance of ferromagnetically contacted carbon nanotubes. Physica E: Low-Dimensional Systems and Nanostructures, 10(1-3), 499-504. https://doi.org/10.1016/S1386-9477(01)00145-X