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Measurements of the A ⇄ B transition in a magnetic field for superfluid3He near the polycritical point

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Abstract

Measurements of both A→B and B→A transitions have been made as a function of magnetic field up to ∼100 G at temperatures and pressures close to the polycritical point (PCP). Forms for the specific heat differenceC A−C B=C 0 (P)−α(P)(T c −T)/T c and for the magnetization differenceM A−M B=βH(T c −T)/T c fit the data satisfactorily except very nearT c , where some other mechanism, thought to be a free energy difference due to residual heat flows, tends to stabilize the A phase. The pressure of the PCP, taken to be that at whichC 0 =0, is found to be 21.22±0.02 bar.

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Authors and Affiliations

  1. Department of Physics, University of California at San Diego, La Jolla, California

    D. N. Paulson, M. Krusius & J. C. Wheatley

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  1. D. N. Paulson
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  2. M. Krusius
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  3. J. C. Wheatley
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Work supported by the U.S. Energy Research and Development Administration under contract number E(04-3)-34, P.A. 143.

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Paulson, D.N., Krusius, M. & Wheatley, J.C. Measurements of the A ⇄ B transition in a magnetic field for superfluid3He near the polycritical point. J Low Temp Phys 25, 699–715 (1976). https://doi.org/10.1007/BF00657293

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  • DOI: https://doi.org/10.1007/BF00657293

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