Structure and Lattice Thermal Conductivity of Fractionally Filled Skutterudites: Solid Solutions of Fully Filled and Unfilled End Members

作者：G. P. Meisner, Donald T. Morelli, Siqing Hu, Jiong Yang, Ctirad Uher · 发表于：Physical Review Letters · 年份：1998 · DOI：10.1103/physrevlett.80.3551 · 被引用次数：360 · 研究领域：Advanced Thermoelectric Materials and Devices、Rare-earth and actinide compounds、Magnetic and transport properties of perovskites and related materials

The structure of the skutterudite ${\mathrm{CoSb}}_{3}$ contains two large empty cages, or voids, per unit cell. Compounds obtained by filling these cages with rare earth atoms possess an enhanced thermoelectric figure of merit. Control of the electronic and thermal transport properties of these materials can be achieved over an extremely wide phase space by partial cage filling in conjunction with Fe alloying on the Co site. We show that such partially filled skutterudites can be rationalized as solid solutions of fully filled ${\mathrm{CeFe}}_{4}{\mathrm{Sb}}_{12}$ and $\ensuremath{\square}{\mathrm{Co}}_{4}{\mathrm{Sb}}_{12}$, where $\ensuremath{\square}$ is a vacancy.