Fizika Nizkikh Temperatur: Volume 44, Number 5 (May 2018), p. 549-553    ( to contents , go back )

The nuclear magnetization of 3He adsorbed by the nanostructured material MCM-41

A.P. Birchenko, N.P. Mikhin, A.S. Neoneta, E.Ya. Rudavskii, and Ya.Yu. Fysun

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Nauky Ave., Kharkiv 61103, Ukraine
E-mail: mikhin@ilt.kharkov.ua

Received December 15, 2017

Abstract

The nuclear magnetization of 3He adsorbed by a nanostructured material of MCM-41 with a channel size of 2.5 nm was investigated using the pulse nuclear magnetic resonance method. The amplitude of the spin-echo signal was measured in the experiment after two probe pulses were applied to the system. The obtained temperature dependence of the signal for various 3He coatings is described by a uniform dependence corresponding to the Curie law. It is shown that the values of the echo signal amplitude obtained in the experiment coincide with the calculated value of the corresponding amplitude due to the nuclear magnetization that arises in the system of nuclear spins of 3He placed in an external magnetic field.

PACS: 67.30.–n 3He;
PACS: 67.30.er Magnetic properties, NMR;
PACS: 67.30.ht Restricted geometries;
PACS: 68.65.–k Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties.

Key words: adsorbed helium, NMR, MCM-41, nuclear magnetization.

Published online: March 27, 2018

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