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Observation of large-scale inhomogeneities in a granular metal |
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| Authors: | R S Newrock M G Di Stefano H K Sin S A Dodds |
| Institution: | 1. Physics Department , University of Cincinnati , Cincinnati, Ohio, 45221, U.S.A.;2. Science Division , Northeast Missouri State University , Kirksville, Missouri, U.S.A.;3. Physics Department , Rice University , Houston, Texas, 77251, U.S.A. |
| Abstract: | Abstract Thick films of granular aluminium dispersed in a tellurium-rich matrix have been formed by co-deposition of the pure elements. Correlation of Rutherford backscattering and superconducting critical-field measurements demonstrates that the films are subdivided into compositionally and electrically distinct layers typically 400–600 Å thick extending across large areas of the specimens. Comparison with the superconducting properties of granular Al: Al2O3 supports earlier suggestions that similar layering is present in that system. |
| Keywords: | Nuclear waste granite microstructure microwave sintering |