High-resolution nuclear magnetic resonance of superfluid [sup 3]He-[ital B]

Journal Article · Mon Feb 07 00:00:00 EST 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.72.864· OSTI ID:5090568

Kycia, J B; Haard, T M; Rand, M R; Hensley, H H; Moores, G F; Lee, Y; Hamot, P J; Sprague, D T; Halperin, W P ^[1]; Thuneberg, E V ^[2]

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1. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
2. Low Temperature Laboratory, Helsinki University of Technology, 02150 Espoo (Finland)

High-resolution nuclear magnetic resonance measurements of bulk superfluid [sup 3]He-[ital B] 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, [beta][sub 345], of the 5 fourth-order coefficients of the order parameter invariants used in the Ginzburg-Landau description of superfluid [sup 3]He. We found that [beta][sub 345] 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 [ital et] [ital al].

• OSTI ID: 5090568
• Journal Information: Physical Review Letters; (United States), Vol. 72:6; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 3
NMR SPECTRA
LARMOR PRECESSION
MAGNETIZATION
PRESSURE DEPENDENCE
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
EVEN-ODD NUCLEI
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
PRECESSION
SPECTRA
STABLE ISOTOPES
665420* - Superfluidity- (1992-)