Electronic transport properties in amorphous and crystallineFeZr2examined via the density of states
| Autor: | M. Dikeakos, Z. Altounian, M. Fradkin |
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| Rok vydání: | 2004 |
| Předmět: | |
| Zdroj: | Physical Review B. 70 |
| ISSN: | 1550-235X 1098-0121 |
| DOI: | 10.1103/physrevb.70.024209 |
| Popis: | An extensive study of ${\mathrm{FeZr}}_{2}$ was undertaken in order to gain insight into the amorphous structure of the glass and the metastable ``big-cube'' structure of the intermediate crystallization product. Examination of the temperature dependence of the resistivity $(\ensuremath{\rho})$ revealed a large $\ensuremath{\rho}$ and negative temperature coefficient of $\ensuremath{\rho}$ $({\ensuremath{\alpha}}_{\ensuremath{\rho}})$ for the glass, which is not unexpected. However, an even larger $\ensuremath{\rho}$ and negative ${\ensuremath{\alpha}}_{\ensuremath{\rho}}$ observed for the $cF96$ big cube is quite unexpected for the crystalline structure in this temperature range. Through tight-binding\char21{}linear muffin tin orbital\char21{}atomic spheres approximation density of states calculations, it is shown that $s\ensuremath{-}d$ scattering is the reason for the high $\ensuremath{\rho}$ and negative ${\ensuremath{\alpha}}_{\ensuremath{\rho}}$ in the big cube, and therefore, $s\ensuremath{-}d$ scattering accounts for the high $\ensuremath{\rho}$ and negative ${\ensuremath{\alpha}}_{\ensuremath{\rho}}$ in transition-metal\char21{}transition-metal glasses. |
| Databáze: | OpenAIRE |
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