Critical current of /sup 3/He-A in narrow channels

Journal Article · Sun Oct 31 23:00:00 EST 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.26.5233· OSTI ID:6791200

Manninen, M T; Pekola, J P; Sharma, R G; Tagirov, M S

The critical current J/sub c/ of superfluid /sup 3/He-A in 0.8-..mu..m-diam channels has been measured by the observation of the pressure difference along the channels versus the mass current. During warming, J/sub c/ was found to decrease by about 30% at cylindrical temperature dependence (T/sub B/A (cyl)) and by another 30% at T/sub B/A; T/sub B/A(cyl) is the reduced B..-->..A transition temperature in the narrow flow channels, with T/sub B/A(cyl)/T/sub B/A = 0.92 at 27.4 bars. Above T/sub B/A a second dissipative mechanism was observed at lower currents. These features are believed to be associated with the ends of the channels.

• Research Organization: Low Temperature Laboratory, Helsinki University of Technology, SF-02150 Espoo 15, Finland
• OSTI ID: 6791200
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 26:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COHERENCE LENGTH
CRITICAL FLOW
CRITICAL VELOCITY
DIAGRAMS
DIMENSIONS
EVEN-ODD NUCLEI
FLUID FLOW
HELIUM 3
HELIUM 3 A
HELIUM 3 B
HELIUM ISOTOPES
ISOTOPES
LENGTH
LIGHT NUCLEI
NUCLEI
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PRESSURE DROP
STABLE ISOTOPES
SUPERFLUIDITY
VELOCITY