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Enhanced electrical resistivity before Néel order in the metals, RCuAs$_2$ (R= Sm, Gd, Tb and Dy | | E.V. Sampathkumaran
; Kausik Sengupta
; S. Rayaprol
; Kartik K. Iyer
; Th. Doert
; J.P.F. Jemetio
; | | Date: |
11 Jun 2003 | | Subject: | Strongly Correlated Electrons; Materials Science | cond-mat.str-el cond-mat.mtrl-sci | | Abstract: | We report an unusual temperature (T) dependent electrical resistivity($
ho$) behavior in a class of ternary intermetallic compounds of the type RCuAs$_2$ (R= Rare-earths). For some rare-earths (Sm, Gd, Tb and Dy) with negligible 4f-hybridization, there is a pronounced minimum in $
ho$(T) far above respective Néel temperatures (T$_N$). However, for the rare-earths which are more prone to exhibit such a $
ho$(T) minimum due to 4f-covalent mixing and the Kondo effect, this minimum is depressed. These findings, difficult to explain within the hither-to-known concepts, present an interesting scenario in magnetism. | | Source: | arXiv, cond-mat/0306266 | | Services: | Forum | Review | PDF | Favorites | |
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