Synthesis and physical properties of a new caged compound Ce3Pd20As6 of the C6Cr23-type structure

JOURNAL OF ALLOYS AND COMPOUNDS

卷:622

Article

Orita, K.¹  Uenishi, K.²  Tsubota, M.³  Shimada, Y.²  Onimaru, T.²  Takabatake, T.²  Kitagawa, J.¹ 

[1] Fukuoka Inst Technol, Fac Engn, Dept Elect Engn, Higashi Ku, Fukuoka 8110295, Japan

[2] Hiroshima Univ, ADSM, Dept Quantum Matter, Higashihiroshima 7398530, Japan

[3] Physonit Inc, Hiroshima 7360044, Japan

关键词: Rare earth alloys and compounds;    Crystal structure;    Heavy fermions;    Heat capacity;    Magnetisation;    X-ray diffraction;   

DOI  :  10.1016/j.jallcom.2014.10.144

来源: Elsevier

【 摘 要 】

We have found that Ce3Pd20As6 crystallizes into a cubic C6Cr23-type structure. Combination of electron probe microanalysis of the chemical composition and Rietveld analysis of the powder X-ray diffraction pattern has revealed an inhomogeneous atomic composition of variable stoichiometry. The physical properties of Ce3Pd20As6 were investigated by measuring the magnetization, electrical resistivity and specific heat. The 4f electrons of Ce3+ ions are well localized but do not show phase transition down to 0.5 K. The metallic electrical resistivity shows a weak Kondo screening. The residual resistivity ratio is rather low probably due to the variable stoichiometry. The magnetization curve and magnetic entropy suggest the Gamma(8) quartet crystalline-electric-field ground state at least one of two Ce sites. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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