Persistent-current experiments on superfluid 3He-B and 3He-A

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Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
1984-07-02
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Mcode
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Language
en
Pages
4
70-73
Series
Physical Review Letters, Volume 53, issue 1-2
Abstract
We have investigated persistent flow of superfluid 3He with an ac gyroscope filled with 20-μm powder. In 3He-B, currents circulate undiminished for 48 h at least; this implies a viscosity 12 orders of magnitude lower than in the normal fluid. In 3He-A, the current does not persist. The observed critical velocity in 3He-B at P12 bars there are two regimes in the B phase: For example, at 29.3 bars the ultimate critical velocities are 5.4 and 7.8 mm/s, respectively.
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Citation
Pekola , J P , Simola , J T , Nummila , K K , Lounasmaa , O V & Packard , R E 1984 , ' Persistent-current experiments on superfluid 3He-B and 3He-A ' , Physical Review Letters , vol. 53 , no. 1-2 , pp. 70-73 . https://doi.org/10.1103/PhysRevLett.53.70