Enhanced Electrical Resistivity before Néel Order in the MetalsRCuAs2(R=Sm, Gd, Tb, and Dy)
| Autor: | Sudhindra Rayaprol, E. V. Sampathkumaran, Kartik K. Iyer, Kausik Sengupta, J. P. F. Jemetio, Th. Doert |
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| Rok vydání: | 2003 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 91 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.91.036603 |
| Popis: | We report an unusual temperature ($T$) dependent electrical resistivity ($\ensuremath{\rho}$) behavior in a class of ternary intermetallic compounds of the type $R{\mathrm{C}\mathrm{u}\mathrm{A}\mathrm{s}}_{2}$ ($R=\mathrm{\text{rare}}$ earths). For some rare earths (Sm, Gd, Tb, and Dy) with negligible $4f$ hybridization, there is a pronounced minimum in $\ensuremath{\rho}(T)$ far above respective N\'eel temperatures (${T}_{N}$). However, for the rare earths which are more prone to exhibit such a $\ensuremath{\rho}(T)$ minimum due to $4f$-covalent mixing and the Kondo effect, this minimum is depressed. These findings, difficult to explain within the hitherto-known concepts, present an interesting scenario in magnetism. |
| Databáze: | OpenAIRE |
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