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Non-linear Mechanical Response of the A-like Phase of Superfluid 3He in Aerogel

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Abstract

We present measurements of the response of the A-like phase of superfluid 3He in aerogel to an applied flow. The measurements are made using a cylindrical piece of 98% silica aerogel attached to a vibrating wire resonator. The resonator is immersed in superfluid 3He at low temperatures and relatively high magnetic fields such that the aerogel confined superfluid is in the A-like phase, while the surrounding fluid is in the bulk B-phase. We observe a variety of interesting non-linear and hysteretic effects when the resonator is driven to higher velocities. We present some of our preliminary findings and speculate on their implications.

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Authors and Affiliations

  1. Physics Department, Lancaster University, Lancaster, LA1 4YB, UK

    D. I. Bradley, S. N. Fisher, A. M. Guénault, R. P. Haley, G. R. Pickett, J. E. Roberts, S. O’Sullivan & V. Tsepelin

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  1. D. I. Bradley
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  2. S. N. Fisher
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  3. A. M. Guénault
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  4. R. P. Haley
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  5. G. R. Pickett
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  6. J. E. Roberts
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  7. S. O’Sullivan
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  8. V. Tsepelin
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Correspondence to J. E. Roberts.

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Bradley, D.I., Fisher, S.N., Guénault, A.M. et al. Non-linear Mechanical Response of the A-like Phase of Superfluid 3He in Aerogel. J Low Temp Phys 148, 603–607 (2007). https://doi.org/10.1007/s10909-007-9486-7

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  • DOI: https://doi.org/10.1007/s10909-007-9486-7

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