arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1410.7859cond-mat.str-el
收藏

新型笼状化合物Ce3Pd20As6的合成及物理性质

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

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

摘要:

我们已经发现,Ce 3 Pd 20 As 6结晶成立方C6 Cr23型结构。结合化学成分的电子探针显微分析和粉末X射线衍射图的Rietveld分析,揭示了可变化学计量的不均匀原子组成。通过测量Ce 3 Pd 20 As 6的磁化强度、电阻率和比热,研究了Ce 3 Pd 20 As 6的物理性能。Ce ~(3+)离子的4f电子局域性很好,但在0.5 K以下没有出现相变。金属电阻率显示出弱的近藤屏蔽。残余电阻率比相当低,可能是由于可变的化学计量。磁化强度曲线和磁熵表明,在两个Ce晶位中至少有一个处于γ_8四重晶体电场基态。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑