Synthesis, Structure, and Basic Magnetic and Thermoelectric Properties of the Light Lanthanide Aurobismuthides

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• 作者：Elizabeth M. Seibel ; Weiwei Xie ; Quinn D. Gibson ; Robert J. Cava
• 刊名：Inorganic Chemistry
• 出版年：2016
• 出版时间：April 4, 2016
• 年：2016
• 卷：55
• 期：7
• 页码：3583-3588
• 全文大小：459K
• ISSN：1520-510X

文摘

We report the crystal structures and elementary properties of the new aurobismuthides La₃Au₃Bi₄, Ce₃Au₃Bi₄, Pr₃Au₃Bi₄, Nd₃Au₃Bi₄, Sm₃Au₃Bi₄, and Gd₃Au₃Bi₄. These ternary compounds are found only for the large lanthanides and crystallize in the cubic Y₃Au₃Sb₄ structure type, which is a stuffed Th₃P₄-type derivative. The compounds are electron-precise, leading to semiconducting behavior, and display magnetic properties arising from localized lanthanide f states. Resistivity data, Seebeck coefficient measurements, and electronic structure calculations suggest that these phases are heavily doped, p-type semiconductors. Nd₃Au₃Bi₄ and Sm₃Au₃Bi₄ have Seebeck coefficients of 105 and 190 μV/K at 350 K, respectively, making them worthy of further thermoelectric studies.