NMR and axial magnetic field textures in stationary and rotating superfluid sup 3 He-B

Journal Article · Tue Aug 01 00:00:00 EDT 1989 · Journal of Low Temperature Physics; (USA)

DOI:https://doi.org/10.1007/BF00681586· OSTI ID:6144279

Hakonen, P J; Krusius, M; Salomaa, M M; Salmelin, R H; Simola, J T ^[1]; Gongadze, A D; Vachnadze, G E; Kharadze, G A ^[2]

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1. Helsinki Univ. of Technology, Espoo (Finland)
2. Institute of Physics, Tbilisi (USSR)

The authors have performed NMR measurements on the flare-out texture of superfluid {sup 3}He-B in a cylindrical container of 5 mm diameter in axial magnetic fields of 28.4 and 56.9 mT. The transverse cw NMR spectra have been analyzed both with respect to their overall shape and the spin-wave absorption peaks close to the Larmor frequency. Their analysis of the stationary state spectra, based on texture computations, yields the longitudinal resonance frequency {nu}{sub L}(T), the magnetic healing length {xi}{sub H}(T), and the dipolar length {xi}{sub D}(T), which they report for pressures below 29 bar. A lattice of quantized vortex lines appears in the rotating state, and two additional textural free energy terms have to be included in the analysis. One of the terms is linear in the applied magnetic field and arises from the spontaneous magnetization of the vortex cores. The second term is quadratic in magnetic field; it is generated both by the superflow field {nu}{sub s}(r) about the vortex core and the difference in the induced magnetizations of the vortex-core and the bulk superfluids. The rotational orienting effects have been studied for rotation speeds {Omega} up to 2 rad/sec.

• OSTI ID: 6144279
• Journal Information: Journal of Low Temperature Physics; (USA), Vol. 76:3-4; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 3 B
NMR SPECTRA
ANISOTROPY
COHERENCE LENGTH
EXCITATION
FREQUENCY DEPENDENCE
L-S COUPLING
LINE WIDTHS
MAGNETIC FIELDS
MAGNETIC FLUX
MAGNETIC PROPERTIES
MAGNETIZATION
MATHEMATICAL MODELS
NUCLEAR MAGNETIC RESONANCE
QUANTIZATION
QUASI PARTICLES
ROTATION
SPIN ORIENTATION
SPIN WAVES
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
TEXTURE
ULTRALOW TEMPERATURE
COUPLING
DIMENSIONS
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
HELIUM 3
HELIUM ISOTOPES
INTERMEDIATE COUPLING
ISOTOPES
LENGTH
LIGHT NUCLEI
MAGNETIC RESONANCE
MOTION
NUCLEI
ORIENTATION
PHYSICAL PROPERTIES
RESONANCE
SPECTRA
STABLE ISOTOPES
640450* - Fluid Physics- Superfluidity