Experiments on Magnetically Driven Superflow in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>-<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi>A</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></math></span>

R. Ruel; H. Kojima

doi:10.1103/PhysRevLett.54.2238

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Experiments on Magnetically Driven Superflow in ${}^{3}{He}$ - $A_{1}$

R. Ruel and H. Kojima

Serir Physics Laboratory, Rutgers University, Piscataway, New Jersey 08854

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Phys. Rev. Lett. 54, 2238 – Published 20 May, 1985

DOI: https://doi.org/10.1103/PhysRevLett.54.2238

Abstract

Magnetically generated superflows were observed in the ${}^{3}{He}$ - $A_{1}$ phase at pressures of 22.3 to 25.9 bars in magnetic fields of 3.7 to 5.5 kG. A two-fluid model is used to calculate the magnitude of the magnetic fountain effect. Critical-velocity effects were observed for sufficiently high flow rates. The critical velocity in the ${}^{3}{He}$ - $A_{1}$ phase was found to be 0.21 mm/sec in the reduced temperature range 0.0004 to 0.008. A threshold field gradient for the magnetic fountain effect was observed in part of the $A_{1}$ phase and may be evidence of fluctuations above $T_{c 2}$ .

References (12)

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[c1] W. J. Gully, D. D. Osheroff, D. T. Lawson, R. C. Richardson, and D. M. Lee, Phys. Rev. A 8, 1633 (1973)

[c2] U. E. Israelsson, B. C. Crooker, H. M. Bozler, and C. M. Gould, Phys. Rev. Lett. 53, 1943 (1984)

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[c11] B. R. Patton, Phys. Lett. 47A, 459 (1974)

[c12] M. Liu, Physica (Utrecht) 109&110B, 1615 (1982)

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Experiments on Magnetically Driven Superflow in ${}^{3}{He}$ - $A_{1}$

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Experiments on Magnetically Driven Superflow in He3-A1

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References (12)

Experiments on Magnetically Driven Superflow in ${}^{3}{He}$ - $A_{1}$