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Author (up) Civale, L.; Pastoriza, H.; Cruz, F. de la; Guimpel, J.; Nieva, G.; Heintz, J.M.; Durmeyer, O.; Kappler, J.P.
Title Meissner fraction of insulating samples of oxide superconductors Type Journal Article
Year 1989 Publication Solid State Communications Abbreviated Journal Solid State Commun.
Volume 72 Issue 4 Pages 341-344
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Abstract The tendency towards superconducting granularity with sample degradation is a common feature of oxide superconductors. We present magnetic, transport and calorimetric results in LiTi$4$ which show that the topological tendency to segregate the superconducting state into islands surrounded by thin insulating layers is related to the structure of the material rather than to a mechanism associated to high T$_C$. We emphasize that insulating samples with small Meissner fraction can have a superconducting volume fraction close to unity.
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Call Number BT @ hernan @ civale89 Serial 8
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