Journal
PHYSICA B-CONDENSED MATTER
Volume 329, Issue -, Pages 1577-1581Publisher
ELSEVIER
DOI: 10.1016/S0921-4526(02)02301-3
Keywords
3D superfluidity; rotating cryostat; vortex state; macroscopic phase coherence; textural state; He-3 in confined geometry
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Two new high-speed rotating cryostats at the ISSP, University of Tokyo, capable of operating at mK temperatures, are currently employed for studies of superfluidity and quantized vortex states in He-4 and He-3. A stable high-Q torsional oscillator is used for the study of superfluidity in low-density He-4 films adsorbed on 3-D connected porous substrates. At T-c, the critical phenomena of 3-D Bose superfluids is seen. Under rotation a new type of vortex state is observed. High-resolution NMR studies of superfluid He-3, contained in capillary arrays of two different diameters, are made as a function of rotational speed. In these experiments, single vortex intrusion events as well as texural modification under rotation are clearly resolved. (C) 2003 Elsevier Science B.V. All rights reserved.
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