FREEZING, MELTING AND SUPERFLUIDITY OF HE-4 NEAR THE MELTING CURVE MINIMUM IN VYCOR

Authors
Citation
E. Molz et J. Beamish, FREEZING, MELTING AND SUPERFLUIDITY OF HE-4 NEAR THE MELTING CURVE MINIMUM IN VYCOR, Physica. B, Condensed matter, 194, 1994, pp. 609-610
Citations number
5
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
09214526
Volume
194
Year of publication
1994
Part
1
Pages
609 - 610
Database
ISI
SICI code
0921-4526(1994)194:<609:FMASOH>2.0.ZU;2-Y
Abstract
Since freezing is suppressed in small pores such as those of Vycor, su perfluidity occurs at substantially higher pressures than in bulk He-4 . Ultrasonic measurements show that the amount of superfluid in the po res does not decrease until freezing begins at a pressure of about 36 bar. At slightly higher pressures partial freezing occurs with complet e freezing above about 36.3 bar. Because of the hysteresis between fre ezing and melting superfluidity sometimes occurs during cooling but no t during warming.