Superfluidity ofHe3Films

Abstract
We have developed a new technique to study superfluidity in saturated liquid-He3 films. Using the enhanced sensitivity of this new method, we directly observe the suppression of the film's transition temperature TcF as the film thickness decreases. We also measure a well-defined maximum critical film current which scales with temperature as (1TTcF)a, where a=1.5±0.17.