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

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/ cm 2⩽Q⩽4 μW/ cm 2 . We observe that at sufficient...

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Published inPhysica. B, Condensed matter Vol. 284; pp. 53 - 54
Main Authors Harter, Alexa W, Lee, Richard A.M, Chui, Talso C.P, Goodstein, David L
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2000
Subjects
4He liquid λ transition
Heat capacity
Phase transition
Heat capacity
4He liquid λ transition
Phase transition
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Summary: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/ cm 2⩽Q⩽4 μW/ cm 2 . 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).
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(99)02016-5