Nuclear magnetic relaxation of 3He in contact with an aerogel above the Fermi temperature

• Published in: JETP letters Vol. 88; no. 12; pp. 823 - 827
• Main Authors: Klochkov, A. V., Kuz’min, V. V., Safiullin, K. R., Tagirov, M. S., Tayurskii, D. A., Mulders, N.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01-02-2008
• Subjects: Atomic; Biological and Medical Physics; Biophysics; Condensed Matter; Molecular; Optical and Plasma Physics; Particle and Nuclear Physics; Physics; Physics and Astronomy; Quantum Information Technology; Solid State Physics; Spintronics; 76.60.-k; 67.55.Cx
• ISSN: 0021-3640; 1090-6487
• DOI: 10.1134/S0021364008240107

The spin kinetics of
3
He in an aerogel has been studied above the Fermi temperature. The magnetic relaxation times
T
1
and
T
2
of adsorbed, gaseous, and liquid
3
He in a 95% silica aerogel at a temperature of 1.5 K have been determined as functions of frequency by means of pulse nuclear magnetic resonance. It has been found that the time
T
1
is linear in frequency in all three cases, whereas
T
2
is independent of frequency. To explain the observed behavior of the longitudinal relaxation rate, a theoretical model of relaxation in the adsorbed layer of
3
He taking into account the filamentary structure of the aerogel is proposed.