Continuous Control of Spin Polarization Using a Magnetic Field
The giant magnetoresistance (GMR) of a point contact between a Co/Cu multilayer and a superconductor tip varies for different bias voltage. Direct measurement of spin polarization by Andreev reflection spectroscopy reveals that the GMR change is due to a change in spin polarization. This work demonstrates that the GMR structure can be utilized as a spin source and that the spin polarization can be continuously controlled by using an external magnetic field.
- Author (aut): Gifford, Jessica
- Author (aut): Zhao, Gejian
- Author (aut): Li, Bochao
- Author (aut): Tracy, Brian
- Author (aut): Zhang, Ji
- Author (aut): Kim, Dongrin
- Author (aut): Chen, Tingyong
- Contributor (ctb): College of Liberal Arts and Sciences