A. V. Klochkov, V. V. Kuz'min, K. R. Safiullin, M. S. Tagirov, D. A. Tayurskii, N. Mulders, “Nuclear magnetic relaxation of <sup>3</sup>He in contact with an aerogel above the Fermi temperature”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2008, Volume 88, Issue 12,Pages <nobr>944

This article is cited in 18 papers

CONDENSED MATTER

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

A. V. Klochkov^a, V. V. Kuz'min^a, K. R. Safiullin^a, M. S. Tagirov^a, D. A. Tayurskii^a, N. Mulders^b

^a Kazan State University, ul. Kremlevskaya 18, Kazan, 420008, Russia
^b University of Delaware, Newark, DE, USA

Abstract: The spin kinetics of ³He in an aerogel has been studied above the Fermi temperature. The magnetic relaxation times T ₁ and T ₂ of adsorbed, gaseous, and liquid ³He 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 ³He taking into account the filamentary structure of the aerogel is proposed.

PACS: 67.55.Cx, 76.60.-k

Received: 11.11.2008