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Analysis of thermal conductivity data in heavy fermion compounds

机译:重费米子化合物的热导率数据分析

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We present a revisiting analysis of thermal conductivity data in heavy fermion compounds. It is shown that the product WmagT, where W-mag is the magnetic part of the thermal resistivity taken as the difference between the inverse of the thermal conductivity of the Kondo compound and that of an equivalent non magnetic compound, is a good measurement of the strength of the Kondo interaction at sufficiently high temperatures with respect to the Kondo temperature and to the crystal-field splitting. In the considered temperature range, WmagT shows a log T dependence in a way similar to the magnetic part of the electrical resistivity. Such an analysis, which is analogous to the well known one for the electrical resistivity, has not been often used for the thermal conductivity. We present data for compounds with four anomalous Kondo rare earths Ce, Pr, Tm and Yb. (C) 2005 Elsevier Ltd. All rights reserved.
机译:我们提出重分析费米子化合物的热导率数据的分析。结果表明,乘积WmagT是Kondo化合物的导热系数的倒数与等效非磁性化合物的导热系数的差之和,其中W-mag是导热系数的磁性部分。关于近藤温度和晶体场分裂,在足够高的温度下近藤相互作用的强度。在所考虑的温度范围内,WmagT以与电阻率的磁性部分相似的方式显示对数T依赖性。这种分析类似于众所周知的电阻率分析,并未经常用于热导率分析。我们提供了具有四个异常近藤稀土Ce,Pr,Tm和Yb的化合物的数据。 (C)2005 Elsevier Ltd.保留所有权利。

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