Stabilization of the 108 K superconducting phase in the Bi0.7Pb0.3SrCaCu1.8Oy system |
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| Authors: | E Agostinelli J Bohandy W J Green C B Bargeron T E Phillips B F Kim F J Adrian and K Moorjani |
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| Affiliation: | (1) Applied Physics Laboratory, The Johns Hopkins University, John Hopkins Road, 20707 Laurel, Maryland;(2) Present address: Istituto di Teoria e Struttura Elettronica e Comportamento Elettrochimico dei Composti di Coordinazione-Consiglio Nazionale delle Ricerche (ITSE-CNR), Area della Ricerca di Roma, 00016 Monterotondo Scalo, Italy |
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| Abstract: | Samples having the nominal composition Bi0.7Pb0.3SrCaCu1.8O
y
, were prepared by a solid-state reaction and characterized by energy-dispersive x-ray microanalysis, resistivity measurements, and magnetically modulated microwave absorption (MAMMA). Longer annealing times resulted in more homogeneous samples having a single superconducting transition to zero resistance at 108 and 105 K at 0.1 and 1 mA, respectively. The MAMMA measurements clearly show differences in sample homogeneity with different annealing times. |
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| Keywords: | Superconductivity Bi2Sr2Ca2Cu3O
y
Pb substitution microwave response conductivity |
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