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.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics