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Incorporation of hyperfine probes into the thin-film superconductor YBa₂Cu₃O₇₋δ during deposition

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  • Radioactive In has been incorporated into oriented thin films of YBa₂Cu₃O₇₋δ during a thermal coevaporation process. The hyperfme technique of perturbed γγ-angular correlation spectroscopy shows that 60% of the indium substitutes at a single site in the superconductor. We obtain spectra with reasonable statistics from 2 mCi of starting material, about 1% of which is incorporated into the film. Other methods of incorporating indium into films and bulk YBa₂Cu₃O₇₋δ have often resulted in a significant amount of indium being incorporated into impurity phases.
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  • Tom, D. W., Platzer, R., Gardner, J. A., & Tate, J. (1993). Incorporation of hyperfine probes into the thin-film superconductor YBa₂Cu₃O₇₋δ during deposition. Applied Physics Letters, 63(23), 3224-3226.
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  • 63
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