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Journal of Low Temperature Physics

, Volume 50, Issue 5–6, pp 605–633 | Cite as

Vibrating wire measurements in liquid3He II. The superfluid B phase

  • D. C. Carless
  • H. E. Hall
  • J. R. Hook
Article

Abstract

Measurements with a vibrating wire viscometer in superfluid3He-B at temperatures down to 0.6 mK are described. The need to consider compressibility of the superfluid component in any analysis of vibrating wire measurements is clearly demonstrated and a theoretical calculation of the force acting on a vibrating wire in a finite compressible superfluid is given. The experimental data are consistent with this calculation if theoretical values of the second viscosity ξ3 are used in the analysis. The failure of the hydrodynamic theory when the quasiparticle mean free path1 is comparable to the wire radius a was observed, and an expression has been deduced for the force acting on the wire when1 is finite. Experimental and theoretical evidence is presented to show that this expression is valid for arbitrary1/a. Values of the viscosity obtained using this expression agree with those obtained in other experimental work and confirm the large discrepancy with theoretical calculations at low reduced temperatures.

Keywords

Viscosity Experimental Data Experimental Work Compressibility Magnetic Material 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 1983

Authors and Affiliations

  • D. C. Carless
    • 1
  • H. E. Hall
    • 1
  • J. R. Hook
    • 1
  1. 1.Physics DepartmentManchester UniversityManchesterEngland

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