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001     192666
005     20250730144921.0
024 7 _ |2 doi
|a 10.1063/1.4879903
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|a 0021-8979
024 7 _ |2 ISSN
|a 0148-6349
024 7 _ |2 ISSN
|a 1089-7550
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037 _ _ |a PUBDB-2014-04241
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|a Antonowicz, J.
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245 _ _ |a Local atomic order, electronic structure and electron transport properties of Cu-Zr metallic glasses
260 _ _ |a Melville, NY
|b American Inst. of Physics
|c 2014
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520 _ _ |a We studied atomic and electronic structures of binary Cu-Zr metallic glasses (MGs) using combined experimental and computational methods including X-ray absorption fine structure spectroscopy, electrical resistivity, thermoelectric power (TEP) measurements, molecular dynamics (MD) simulations, and ab-initio calculations. The results of MD simulations and extended X-ray absorption fine structure analysis indicate that atomic order of Cu-Zr MGs and can be described in terms of interpenetrating icosahedral-like clusters involving five-fold symmetry. MD configurations were used as an input for calculations of theoretical electronic density of states (DOS) functions which exhibits good agreement with the experimental X-ray absorption near-edge spectra. We found no indication of minimum of DOS at Fermi energy predicted by Mott's nearly free electron (NFE) model for glass-forming alloys. The theoretical DOS was subsequently used to test Mott's model describing the temperature variation of electrical resistivity and thermoelectric power of transition metal-based MGs. We demonstrate that the measured temperature variations of electrical resistivity and TEP remain in a contradiction with this model. On the other hand, the experimental temperature dependence of electrical resistivity can be explained by incipient localization of conduction electrons. It is shown that weak localization model works up to relatively high temperatures when localization is destroyed by phonons. Our results indicate that electron transport properties of Cu-Zr MGs are dominated by localization effects rather than by electronic structure. We suggest that NFE model fails to explain a relatively high glass-forming ability of binary Cu-Zr alloys
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|a Pietnoczka, A.
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|a Pękała, K.
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700 1 _ |0 P:(DE-HGF)0
|a Latuch, J.
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|a Evangelakis, Giorgos
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|t Journal of applied physics
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