High-resolution nuclear magnetic resonance of superfluid B3

J. B. Kycia, T. M. Haard, M. R. Rand, H. H. Hensley, G. F. Moores, Y. Lee, P. J. Hamot, D. T. Sprague, W. P. Halperin, and E. V. Thuneberg
Phys. Rev. Lett. 72, 864 – Published 7 February 1994
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Abstract

High-resolution nuclear magnetic resonance measurements of bulk superfluid B3 have been performed at temperatures above 0.5 mK and at pressures from 0.3 to 21.7 bars. We have found that the resonance frequency is shifted from the Larmor frequency of the normal fluid. According to the theory of Greaves the shift at the superfluid transition determines a specific combination, β345, of the 5 fourth-order coefficients of the order parameter invariants used in the Ginzburg-Landau description of superfluid He3. We found that β345 approaches the weak coupling limit at low pressure, and decreases at higher pressures qualitatively consistent with the theory of Sauls and Serene but in disagreement with the results of Tang et al.

  • Received 4 October 1993

DOI:https://doi.org/10.1103/PhysRevLett.72.864

©1994 American Physical Society

Authors & Affiliations

J. B. Kycia, T. M. Haard, M. R. Rand, H. H. Hensley, G. F. Moores, Y. Lee, P. J. Hamot, D. T. Sprague, and W. P. Halperin

  • Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208

E. V. Thuneberg

  • Low Temperature Laboratory, Helsinki University of Technology, 02150 Espoo, Finland

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Vol. 72, Iss. 6 — 7 February 1994

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