Thermal transport in the intermetallic compound CeNi4Cr
Thermal transport in the intermetallic compound CeNi4Cr
复制标题
金属间化合物 CeNi4Cr 中的热传输
DOI：
--
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Toliński
中科院分区：
文献类型：
--
作者：
T. Toliński
研究了 CeNi4Cr 化合物的电阻率、热电势 (TEP)、热导率和热电品质因数，该化合物先前被认为是一种波动价态系统，在低温下具有有效质量增加的趋势。热电特性的分析证实了这种可能性，并提供了德拜温度、费米能量和 f 带位置等特征参数。热电势和电阻率的磁性部分都可以在类似的模型中进行分析，假设费米能附近有洛伦兹形式的窄 f 带。热导率表明，在 220 K 以下，声子的贡献超过了电子的贡献。
Electrical resistivity, thermopower (TEP), thermal conductivity and the thermoelectric figure of merit are studied for the CeNi4Cr compound, which has been previously suggested to be a fluctuating valence system with a tendency to the increase of the effective mass at low temperatures. The analysis of the thermoelectric properties confirms such a possibility and provides characteristic parameters like the Debye temperature, Fermi energy and the position of the f band. Both the thermopower and the magnetic part of the electrical resistivity could be analyzed within a similar model assuming a narrow f-band of the Lorentzian form near the Fermi energy. The thermal conductivity shows that the phonon contribution exceeds the electronic one below 220 K.