Specific heat studies of {sup 3}He, {sup 4}He and {sup 3}He-{sup 4}He mixture films in cylindrical cavities
Using an AC calorimetry technique, the authors have performed a systematic specific heat study for {sup 3}He and {sup 4}He films adsorbed in the 0.2 {mu}m cylindrical pores of Anopore membranes. The specific heat submonolayer up to multilayer coverages of {sup 3}He and {sup 4}He films was studied in the temperature range 0.1-1.0 K. For low coverages, common specific heat behavior is found for both {sup 3}He and {sup 4}He films. At thicker coverages, a growing peak, shifting to higher temperatures, is found in {sup 4}He films. It is not present in {sup 3}He film studies. The nature of the {sup 4}He peak was probed by adding small doses of {sup 3}He. Mixture films with {sup 3}He concentrations ranging between 0.4 and 530% were thus studied in the same temperature range. It is found that the specific heat peak decreases in size becomes narrower and shifts to lower temperature as a function of {sup 3}He concentration. It eventually disappears at the highest concentration. The authors believe that this peak is related to the superfluid properties of the {sup 4}He films.
- OSTI ID:
- 243828
- Report Number(s):
- CONF-9304297-; ISSN 0003-0503; CNN: Grant DMR 90-13979; TRN: 96:002199-0347
- Journal Information:
- Bulletin of the American Physical Society, Vol. 38, Issue 2; Conference: 1993 joint meeting of the American Physical Society and the American Association of Physics Teachers, Washington, DC (United States), 12-15 Apr 1993; Other Information: PBD: Apr 1993
- Country of Publication:
- United States
- Language:
- English
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