23Na NMR studies of the Na-K eutectic alloy embedded into porous glass with 7-nm pores showed that melting of Na 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.
|期刊||Physical Review B - Condensed Matter and Materials Physics|
|出版狀態||Published - 2013 四月 3|
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