Phase transitions in confined gallium droplets

被引:114
作者
Di Cicco, A [1 ]
机构
[1] Univ Camerino, Dipartimento Matemat & Fis, UdR INFM, I-62032 Camerino, Italy
关键词
D O I
10.1103/PhysRevLett.81.2942
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Phase transitions in submicrometric Ga droplets confined in epoxy resin are studied by combining energy-dispersive x-ray diffraction (EDXRD), x-ray absorption fine structure, and single-energy x-ray absorption. The restricted fluid is undercooled down to 150 K while the melting point is depressed down to 254 K. Melting and freezing are sharp processes occurring with temperature broadening of 1 and 10 K, respectively. EDXRD patterns are consistent with that of beta-Ga, while the stable phase at ambient conditions alpha-Ga is not found to exist. Appearance of gamma-Ga and delta-Ga solid phases and relevance of present results to recent studies of Ga confined in porous glass are discussed.
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页码:2942 / 2945
页数:4
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