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

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 14期

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.

引用

页码：2942 / 2945

页数：4

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