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Magnetic Field Dependence of the A-like to B-like Transition of Superfluid 3He in Aerogel

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Abstract

Longitudinal ultrasound attenuation of superfluid 3He in 98% aerogel has been measured at 33 bar and 6.22 MHz in the presence of magnetic fields up to 4.44 kG. The A-like to B-like (A-B like) phase transition in aerogel was identified by a rounded jump in attenuation while sweeping the temperature at a fixed magnetic field perpendicular to the direction of sound propagation. The suppression of the B-like phase was monitored as the magnetic field increased until the A-like phase region extended below our lowest attainable temperature (0.2 mK) at the highest field. In addition, the attenuation in the metastable A-like phase that appears when cooling in zero magnetic field was almost identical to the values observed in the A-like phase in high magnetic field.

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Authors and Affiliations

  1. National High Magnetic Field Laboratory and Department of Physics, University of Florida, Gainesville, FL, 32611-8440, USA

    B. H. Moon, N. Masuhara, P. Bhupathi, M. Gonzalez, M. W. Meisel & Y. Lee

  2. Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716, USA

    N. Mulders

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  1. B. H. Moon
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  2. N. Masuhara
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  3. P. Bhupathi
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  4. M. Gonzalez
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  5. M. W. Meisel
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  6. N. Mulders
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  7. Y. Lee
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Correspondence to B. H. Moon.

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Moon, B.H., Masuhara, N., Bhupathi, P. et al. Magnetic Field Dependence of the A-like to B-like Transition of Superfluid 3He in Aerogel. J Low Temp Phys 158, 170–175 (2010). https://doi.org/10.1007/s10909-009-9954-3

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  • DOI: https://doi.org/10.1007/s10909-009-9954-3

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