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

S. Nesterenko; V. Avzuragova; A. Tursina; A. M. Strydom

doi:10.1016/j.jallcom.2019.04.026

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

S. Nesterenko, V. Avzuragova, A. Tursina, A. M. Strydom

Physics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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 P4₂/nmc, NdRh₄Al_15.37 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.

Original language	English
Pages (from-to)	1061-1067
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	792
DOIs	https://doi.org/10.1016/j.jallcom.2019.04.026
Publication status	Published - 5 Jul 2019

Keywords

Crystal structure
Electrical transport
Heat capacity
Intermetallics
Magnetization
Magnetoresistance

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2019.04.026

Cite this

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

abstract = "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 P42/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.",

keywords = "Crystal structure, Electrical transport, Heat capacity, Intermetallics, Magnetization, Magnetoresistance",

author = "S. Nesterenko and V. Avzuragova and A. Tursina and Strydom, {A. M.}",

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T1 - New ternary aluminides RERh4Al15 (RE = La, Ce, Pr, Sm, Gd)

AU - Nesterenko, S.

AU - Avzuragova, V.

AU - Tursina, A.

AU - Strydom, A. M.

PY - 2019/7/5

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N2 - 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 P42/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.

AB - 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 P42/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.

KW - Crystal structure

KW - Electrical transport

KW - Heat capacity

KW - Intermetallics

KW - Magnetization

KW - Magnetoresistance

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