We have carried out torsional oscillator and heat capacity measurements on solid He4 samples grown within a geometry which restricts the helium to thin (150μm) cylindrical disks. In contrast with previously reported values from Rittner and Reppy of 20% nonclassical rotational inertia for similar confining dimensions, 0.9% nonclassical rotational inertia (consistent with that found in bulk samples and samples embedded in porous media) was observed in our torsional oscillator cell. In this confined geometry, the heat capacity peak is consistent with that found in bulk solid samples of high crystalline quality.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)