Spin injection into carbon nanotubes and a possible application in spin-resolved scanning tunnelling microscopy
- 23 August 2001
- journal article
- Published by IOP Publishing in Nanotechnology
- Vol. 12 (3), 281-284
- https://doi.org/10.1088/0957-4484/12/3/314
Abstract
We present magnetotransport measurements on multiwall nanotubes contacted by ferromagnetic electrodes that are 1 µm apart. The observed magnetoresistance of 2.2% is consistent with a spin-scattering length of at least 380 nm. We further discuss a novel concept for spin-resolved scanning tunnelling microscopy (SR-STM) with a carbon-nanotube tip. The concept relies on a long spin-scattering length as well as on spin-dependent scattering at the interfaces to the ferromagnetic electrodes. The observed magnitude of the magnetoresistance effect and the distance between the electrodes are large enough for application in a SR-STM.Keywords
This publication has 24 references indexed in Scilit:
- Real-Space Imaging of Two-Dimensional Antiferromagnetism on the Atomic ScaleScience, 2000
- Real-Space Observation of Dipolar Antiferromagnetism in Magnetic Nanowires by Spin-Polarized Scanning Tunneling SpectroscopyPhysical Review Letters, 2000
- Spin-polarized scanning tunneling microscopy on ferromagnetsApplied Physics Letters, 1999
- MagnetoelectronicsScience, 1998
- Spin-polarized tunneling by spin-polarized scanning tunneling microscopyJournal of Applied Physics, 1998
- Magnetic domains of cobalt ultrathin films observed with a scanning tunneling microscope using optically pumped GaAs tipsApplied Physics Letters, 1997
- Spin-polarized tunneling with GaAs tips in scanning tunneling microscopyPhysical Review B, 1996
- Micromagnetic Microscopy and ModelingPhysics Today, 1995
- Observation of vacuum tunneling of spin-polarized electrons with the scanning tunneling microscopePhysical Review Letters, 1990
- Conductance and exchange coupling of two ferromagnets separated by a tunneling barrierPhysical Review B, 1989