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Title: Discovery of a metastable Al{sub 20}Sm{sub 4} phase

We present an efficient genetic algorithm, integrated with experimental diffraction data, to solve a nanoscale metastable Al{sub 20}Sm{sub 4} phase that evolves during crystallization of an amorphous magnetron sputtered Al{sub 90}Sm{sub 10} alloy. The excellent match between calculated and experimental X-ray diffraction patterns confirms an accurate description of this metastable phase. Molecular dynamic simulations of crystal growth from the liquid phase predict the formation of disordered defects in the devitrified crystal.
Authors:
; ; ; ; ; ; ;  [1] ;  [1] ;  [2] ;  [3] ;  [1] ;  [2] ;  [4]
  1. Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011 (United States)
  2. (China)
  3. Hefei National Laboratory for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)
  4. (United States)
Publication Date:
OSTI Identifier:
22395700
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 10; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALGORITHMS; ALUMINIUM BASE ALLOYS; CRYSTAL DEFECTS; CRYSTAL GROWTH; CRYSTALLIZATION; CRYSTALS; LIQUIDS; METASTABLE STATES; NANOSTRUCTURES; SAMARIUM ALLOYS; SPUTTERING; X-RAY DIFFRACTION