Heat capacity measurements of ⁴He at constant heat flux near T_λ

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• 作者：Alexa W. Harter ; Richard A. M. Lee ; Talso C. P. Chui ; David L. Goodstein
• 刊名：Physica B
• 出版年：2000
• 出版时间：July 2000
• 年：2000
• 卷：284-288
• 期：Part 1
• 页码：53-54
• 全文大小：69 K

文摘

The heat capacity, C_Q, of superfluid ⁴He in the presence of a constant heat flux, Q, is expected to diverge at a depressed transition temperature, T_c(Q). We have taken preliminary measurements of C_Q at various heat flux values in the range 1 μW/cm²Q4 μW/cm². We observe that at sufficiently small reduced temperatures, C_Q is enhanced as a function of Q, and that the enhancement is larger than theoretical predictions by Chui et al. and Hausmann and Dohm (Phys. Rev. Lett 77 (1996) 980, 1793; preprint).