Fast Diffusion Process in Quenched hcp Dilute Solid $^3$He-$^4$He Mixture

Details Fast Diffusion Process in Quenched hcp Dilute Solid $^3$He-$^4$He Mixture Fast Diffusion Process in Quenched hcp Dilute Solid $^3$He-$^4$He Mixture

2009-06-17

arxiv.org/abs/0906.3163v1

Physics

Condensed Matter

Other Condensed Matter

7 pages, 3 figures, QFS2009

Scientific paper

The study of phase structure of dilute $^3$He - $^4$He solid mixture of different quality is performed by spin echo NMR technique. The diffusion coefficient is determined for each coexistent phase. Two diffusion processes are observed in rapidly quenched (non-equilibrium) hcp samples: the first process has a diffusion coefficient corresponding to hcp phase, the second one has huge diffusion coefficient corresponding to liquid phase. That is evidence of liquid-like inclusions formation during fast crystal growing. It is established that these inclusions disappear in equilibrium crystals after careful annealing.

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