Co1−xFexS2: A Tunable Source of Highly Spin-Polarized Electrons
| Autor: | Koichiro Umemoto, J. G. Checkelsky, Chia-Ling Chien, Chris Leighton, E. D. Dahlberg, Tingyong Chen, J.C. Eckert, Lan Wang, Renata M. Wentzcovitch |
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| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 94 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.94.056602 |
| Popis: | In the emerging field of spin-electronics ideal ferromagnetic electron sources would not only possess a high degree of spin polarization, but would also offer control over the magnitude of this polarization. We demonstrate here that a simple scheme can be utilized to control both the magnitude and the sign of the spin polarization of ferromagnetic ${\mathrm{C}\mathrm{o}\mathrm{S}}_{2}$, which we probe with a variety of techniques. The position of the Fermi level is fine-tuned by solid solution alloying with the isostructural diamagnetic semiconductor ${\mathrm{F}\mathrm{e}\mathrm{S}}_{2}$, leading to tunable spin polarization of up to 85%. |
| Databáze: | OpenAIRE |
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