SUMMARY
The discussion centers on the achievement of positive magnetoresistance (MR) in carbon nanotube (CNT) composite thin films with the inclusion of iron (Fe). The presence of Fe injects spin-polarized electrons into the CNTs, leading to an increase in resistance with the application of a magnetic field, which contradicts the expected decrease in resistance due to the spin injection. Experiments conducted in a magnetic field range of 0 to 1.1 tesla indicate that positive MR is contingent on the presence of Fe, as no MR was observed in pure CNTs. The factors influencing this phenomenon, including potential magnetostriction effects, are under investigation.
PREREQUISITES
- Understanding of magnetoresistance principles
- Knowledge of carbon nanotube (CNT) properties
- Familiarity with spin-polarized electron injection
- Basic concepts of magnetostriction in materials
NEXT STEPS
- Research the mechanisms of positive magnetoresistance in composite materials
- Explore the effects of spin-polarized electron injection in CNTs
- Investigate the role of magnetostriction in ferromagnetic materials
- Study the impact of varying concentrations of CNTs and Fe on electrical properties
USEFUL FOR
Researchers in materials science, physicists studying magnetoresistance, and engineers working with carbon nanotube composites will benefit from this discussion.