Universal Behaviour of the Superfluid Fraction and Tc of He-3 in 99.5% Open Aerogel

Abstract

We have investigated the superfluid transition of He-3 in a 99.5% porosity silica aerogel. This very dilute sample shows behaviour intermediary between bulk He-3 and He-3 confined to the denser aerogels previously studied. We present data on both the superfluid transition temperature and the superfluid density and compare our results with previous measurements. Finally, we show that the suppression of the superfluid transition temperature and suppression of the superfluid density of He-3 in aerogel follow a universal relation for a range of aerogel samples.

4 pages, 5 figures; 1 new figure, minor changes

References in corpus (4)

• Models for Superfluid ${}^3$He in Aerogel
• Critical temperature and superfluid density suppression in disordered high-$T_c$ cuprate superconductors
• Evidence for superfluid B-phase of 3He in aerogel
• Torsional oscillator studies of the superfluidity of 3He in aerogel

Cited by in corpus (8)

• Local mean-field study of capillary condensation in silica aerogels
• Phase Diagram of the Superfluid Phases of 3He in 98% Aerogel
• Magnetization and Spin-Diffusion of Liquid 3He in Aerogel
• NMR measurements of hyperpolarized 3He gas diffusion in high porosity silica aerogels
• Model of Inhomogeneous Impurity Distribution in Fermi Superfluids
• Collision Drag Effect on Propagation of Sound in Liquid ${}^3$He in Aerogel
• Spin susceptibility of the superfluid ${}^3$He-B in aerogel
• Strong-Coupling Effects in "Dirty" Superfluid ${}^{3}He$