Vitrification of Liquid Inclusions in hcp 3He-4He Crystal: the Role of an Intermediate bcc Phase

The phase structure of the rapidly quenched solid helium samples is studied by the NMR technique in dilute 3 He- 4 He mixtures at 1.35–1.8 K. The pulse NMR method is used to measure the spin-lattice and spin-spin relaxation times for all coexisting phases. An additional spin-lattice relaxation proce...

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Veröffentlicht in:Journal of low temperature physics 2014-04, Vol.175 (1-2), p.154-159
Hauptverfasser: Mikhin, N. P., Birchenko, A. P., Neoneta, A. S., Rudavskii, E. Y., Baidakov, V. G.
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container_issue 1-2
container_start_page 154
container_title Journal of low temperature physics
container_volume 175
creator Mikhin, N. P.
Birchenko, A. P.
Neoneta, A. S.
Rudavskii, E. Y.
Baidakov, V. G.
description The phase structure of the rapidly quenched solid helium samples is studied by the NMR technique in dilute 3 He- 4 He mixtures at 1.35–1.8 K. The pulse NMR method is used to measure the spin-lattice and spin-spin relaxation times for all coexisting phases. An additional spin-lattice relaxation process is found just before vitrification of the liquid inclusions in hcp matrix. The relaxation rate of the new process coincides with that of bcc solid. It has been found that the new relaxation process is observed only in the temperature region of the phase diagram where an equilibrium bcc phase exists. After the liquid inclusions vitrification has been completed, the contribution from the bcc phase is not detected. The spin-lattice relaxation times in all of coexisting phases are discussed.
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subjects Body centered cubic lattice
Characterization and Evaluation of Materials
Close packed lattices
Condensed Matter Physics
Hexagonal cells
Inclusions
Liquids
Magnetic Materials
Magnetism
Nuclear magnetic resonance
Physics
Physics and Astronomy
Spin-lattice relaxation
Vitrification
title Vitrification of Liquid Inclusions in hcp 3He-4He Crystal: the Role of an Intermediate bcc Phase
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