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.
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- Continuous Control of Spin Polarization Using a Magnetic Field
- Gifford, Jessica (Author)
- Zhao, Gejian (Author)
- Li, Bochao (Author)
- Tracy, Brian (Author)
- Zhang, Ji (Author)
- Kim, Dongrin (Author)
- Chen, Tingyong (Author)
- College of Liberal Arts and Sciences (Contributor)
- Digital object identifier: 10.1063/1.4952437
- Identifier TypeInternational standard serial numberIdentifier Value0003-6951
- Identifier TypeInternational standard serial numberIdentifier Value1077-3118
- This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Applied Physics Letters and may be found at http://aip.scitation.org/doi/10.1063/1.4952437, opens in a new window.
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Gifford, J. A., Zhao, G. J., Li, B. C., Tracy, B. D., Zhang, J., Kim, D. R., . . . Chen, T. Y. (2016). Continuous control of spin polarization using a magnetic field. Applied Physics Letters, 108(21), 212401. doi:10.1063/1.4952437