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Author Frenkel, A. ♦ Stern, E. A. ♦ Voronel, A. ♦ Rubshtein, A. ♦ Ben-Ezra, Y. ♦ Fleurov, V.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ALUMINIUM BASE ALLOYS ♦ BOND LENGTHS ♦ LANTHANUM ALLOYS ♦ METALLIC GLASSES ♦ ANNEALING ♦ CRYSTALLIZATION ♦ COMPUTERIZED SIMULATION ♦ MONTE CARLO METHOD ♦ ABSORPTION SPECTRA ♦ X RADIATION ♦ SHORT-RANGE ORDER
Abstract X-ray-absorption fine-structure (XAFS) measurements of metallic glass Al{sub 0.91}La{sub 0.09} and a crystalline phase Al{sub 11}La{sub 3} formed by annealing of the glass were made at the La {ital L}{sub 3} edge and analyzed by the splice method. The first-neighbor partial radial distribution functions about the La atoms for the crystal and glass were obtained at {ital T}=12 K demonstrating the difference between their local structures. The shortest La-Al distance (mean value 3.09{plus_minus}0.05 A) within the glass was distinctively smaller than within the crystal Al{sub 11}La{sub 3} (3.21{plus_minus}0.05 A). This partial shortening of the La-Al bonds decreases the size mismatch between the La and Al atoms making the glass formation more favorable with anomalously low content of La during the quench. Monte Carlo simulations were performed for the Al-La glass and agreement with the XAFS result was obtained. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-07-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 54
Issue Number 2


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