Spin polarization ratios of resistivity and density of states estimated from anisotropic magnetoresistance ratio for nearly half-metallic ferromagnets
| Autor: | Kokado, Satoshi, Sakuraba, Yuya, Tsunoda, Masakiyo |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Jpn. J. Appl. Phys. 55, 108004 (2016) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.7567/JJAP.55.108004 |
| Popis: | We derive a simple relational expression between the spin polarization ratio of resistivity, $P_\rho$, and the anisotropic magnetoresistance ratio $\Delta \rho/\rho$, and that between the spin polarization ratio of the density of states at the Fermi energy, $P_{\rm DOS}$, and $\Delta \rho/\rho$ for nearly half-metallic ferromagnets. We find that $P_\rho$ and $P_{\rm DOS}$ increase with increasing $|\Delta \rho/\rho|$ from 0 to a maximum value. In addition, we roughly estimate $P_\rho$ and $P_{\rm DOS}$ for a Co$_2$FeGa$_{0.5}$Ge$_{0.5}$ Heusler alloy by substituting its experimentally observed $\Delta \rho/\rho$ into the respective expressions. Comment: 10 pages, 3 figures, 2 tables, to be published in Jpn. J. Appl. Phys |
| Databáze: | arXiv |
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