2003/06/11 by E. V. Sampathkumaran, Kausik Sengupta, Sudhindra Rayaprol +5 · 3 citations
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.91.036603
Physical Review Letters (accepted for publication)
arxiv created 2003/06/11 · openalex publication_date 2003/07/18 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We report an unusual temperature (T) dependent electrical resistivity (\ensuremathρ) behavior in a class of ternary intermetallic compounds of the type RCuAs2 (R=rare earths). For some rare earths (Sm, Gd, Tb, and Dy) with negligible 4f hybridization, there is a pronounced minimum in \ensuremathρ(T) far above respective N'eel temperatures (TN). However, for the rare earths which are more prone to exhibit such a \ensuremathρ(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.