Low temperature melting curve of He3

R. T. Johnson, O. V. Lounasmaa, R. Rosenbaum, O. G. Symko, J. C. Wheatley

Research output: Contribution to journalArticlepeer-review


Measurements of the melting curve of He3 have been made from 3 m° K to 40 m° K, after cooling the liquid-solid He3 mixture by the adiabatic solidification method. The slope of the melting curve shows that at the lowest temperature there is a substantial departure of the solid He3 entropy from R ln 2. This effect is due to nuclear spin ordering. Temperatures below 3 m° K were obtained during compression. By theoretically estimating the melting curve below 3 m° K it is possible to estimate temperatures from pressure measurements. By such means it is estimated that Kelvin temperatures of 1.5 to 2 m° K were actually achieved.

Original languageEnglish
Pages (from-to)403-421
Number of pages19
JournalJournal of Low Temperature Physics
Issue number3-4
StatePublished - May 1970
Externally publishedYes


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