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

Article

关键词: NMR;    TEMPERATURE;    PARTICLES;    METALS;   

DOI  :  10.1103/PhysRevB.87.155401

来源: SCIE

【 摘 要 】

Na-23 NMR studies of the Na-K eutectic alloy embedded into porous glass with 7-nm pores showed that melting of Na2K 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. DOI: 10.1103/PhysRevB.87.155401

【 授权许可】

Free