4 d element induced improvement of structural disorder and development of weakly reentrant spin-glass behavior in NiRuMnSn
Résumé
The pursuit of efficient spin-polarization in quaternary Heusler alloys with the general formula XX′Y Z (where X, X′, and Y are transition metals and Z is a p-block element), has been a subject of significant scientific interest. While previous studies shows that isoelectronic substitution of 4d element in place of 3d element in quaternary Heusler alloy, improves the half-metallic ferromagnetic characteristics, our research on the quaternary Heusler alloy NiRuMnSn reveals a strikingly different scenario. In this study, we present a detailed structural analysis of the material using X-ray absorption fine structure (EXAFS) and neutron diffraction (ND) techniques, which confirms the formation of a single-phase compound with 50:50 site disorder between Ni/Ru atoms at 4c/4d sites. Contrary
to expectations, our DFT calculations suggests a considerable decrease in spin-polarization even in the ordered structure. Additionally, we report on the compound’s exceptional behavior, displaying a rare re-entrant spin glass property below ∼60 K, a unique and intriguing feature for quaternary Heusler-type compounds.
Domaines
Matériaux| Origine | Fichiers produits par l'(les) auteur(s) |
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