Continuous melting and thermal-history-dependent freezing in the confined Na-K eutectic alloy

super(23)Na NMR studies of the Na-K eutectic alloy embedded into porous glass with 7-nm pores showed that melting of Na sub(2) K confined nanoparticles is a continuous process with smooth changes in the Knight shift of a narrow resonance line and nuclear spin relaxation between those in the crystall...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2013-04, Vol.87 (15), Article 155401
Main Authors: Charnaya, E. V., Lee, M. K., Tien, Cheng, Chang, L. J., Wu, Z.-J., Kumzerov, Yu. A., Bugaev, A. S.
Format: Article
Language:English
Subjects:
Condensed matter
Eutectic alloys
Freezing
Inverse
Liquids
Melting
Nanoparticles
Transformations
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Summary:super(23)Na NMR studies of the Na-K eutectic alloy embedded into porous glass with 7-nm pores showed that melting of Na sub(2) K confined nanoparticles is a continuous process with smooth changes in the Knight shift of a narrow resonance line and nuclear spin relaxation between those in the crystalline and liquid states. The intermediate state, which occurs upon melting is stable and more favorable than the liquid state. The inverse freezing transformation can be sharp as at a first-order transition or continuous depending on the initial temperature of cooling. The results suggest revision of theoretical predictions for the melting and freezing transitions in confined geometry.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.87.155401