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New ternary aluminides RERh4Al15 (RE = La, Ce, Pr, Sm, Gd)

MPG-Autoren
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Strydom,  A. M.
Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Nesterenko, S., Avzuragova, V., Tursina, A., & Strydom, A. M. (2019). New ternary aluminides RERh4Al15 (RE = La, Ce, Pr, Sm, Gd). Journal of Alloys and Compounds, 792, 1061-1067. doi:10.1016/j.jallcom.2019.04.026.


Zitierlink: https://hdl.handle.net/21.11116/0000-0003-A864-F
Zusammenfassung
The aluminum-rich intermetallic rare earth compounds RERh4Al15 (RE = La, Ce Pr, Sm, Gd) were synthesized by arc melting of the elements under an argon atmosphere. The samples were characterized by powder X-ray diffraction which revealed a straight-forward agreement of the synthesized materials with tetragonal space group P4(2)/nmc, NdRh4Al15.37 structure type. The structures of CeRh4Al15 and PrRh4Al15 were refined from single-crystal X-ray diffraction data. CeRh4Al15 is a new correlated electron compound with Kondo interaction. There is no magnetic ordering above 0.05 K despite the localized Ce3+ magnetic moment behaviour near room temperature. The electronic specific heat, magnetic susceptibility and electrical resistivity indicate that the compound may be accidently poised near a magnetic quantum critical point. (C) 2019 Elsevier B.V. All rights reserved.