Abstract
Superfluid density and heat capacity experiments on3He-4He mixtures in 98% porous aerogel show that in this system the coexistence boundary is detached from the superfluid transition line. The tricritical point is removed, and there is a superfluid phase on the3He rich side of the phase diagram. The presence of heat capacity peaks along the transition line down to a4He concentration of only 8% indicates the 3-dimensional nature of this transition.
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This work is supported by NSF under grants DMR-9008461 and DMR-9311918.
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Mulders, N., Ma, J., Kim, S.B. et al. 3He-4He mixtures in aerogel. J Low Temp Phys 101, 95–105 (1995). https://doi.org/10.1007/BF00754565
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DOI: https://doi.org/10.1007/BF00754565