Abstract
We have investigated the low temperature heat capacity of superfluid 4He films adsorbed in the 0.2 μm diameter, nearly cylindrical, parallel pores of Anopore membranes using an AC calorimetry technique. The heat capacity temperature dependence changes drastically at a coverage dependent temperature. At low temperatures, the heat capacity of the superfluid film increases with thickness. This behavior is reversed for temperatures above 0.7 K where the heat capacity is found to decrease with thickness.
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