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低温比热的测量,对基础理论和材料性质的研究都有重要意义.低温比热在提供费米面电子态密度和晶格振动的非谐性等信息方面,要求其测量值有较好的绝对精度;而研究结构相变以及缺陷、杂质的影响,则要求有较高的相对精度,特别是研究相变的临界行为,要求在很小温区内提供大量的数据
Measurement of low temperature specific heat is of great significance to the study of basic theory and material properties.Low temperature specific heat requires better absolute absolute value of measured value in terms of information on Fermi surface electron density and lattice vibrational anharmonicity Accuracy; and the study of structural phase changes and defects, the impact of impurities, it requires a higher relative accuracy, especially the critical phase transition behavior, requiring a large amount of data in a small temperature zone