SCHONBERGER, R and OTTO, HH and BRUNNER, B and RENK, KF (1991) EVIDENCE FOR FILAMENTARY SUPERCONDUCTIVITY UP TO 220-K IN ORIENTED MULTIPHASE Y-BA-CU-O THIN-FILMS. PHYSICA C, 173 (3-4). pp. 159-162. ISSN 0921-4534,
Full text not available from this repository.Abstract
We report on the observation of filamentary superconductivity up to 220 K in multiphase Y-Ba-Cu-O materials that are deposited as highly oriented thin films on (110)-SrTiO3 substrates by laser ablation from ceramic targets. The high temperature zero resistivity states are reproducible after temperature cycling down to 80 K for samples treated by a special oxygenation and ozonization process at 340 K and measured in a pure oxygen atmosphere. Our results on thin films confirm former experiments of J.T. Chen and co-workers obtained on ceramic samples with preferred crystallite orientation. A close connection between superconductivity and structural instabilities of most likely ferroic nature, which are observed more often for YBa2Cu3O7 in a narrow temperature range near 220 K, is suggested.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HIGH-TEMPERATURE SUPERCONDUCTIVITY; PHASE-TRANSITIONS; FERROELECTRICITY; YBA2CU3O7-DELTA; ANOMALIES; 230-K; |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:46 |
| URI: | https://pred.uni-regensburg.de/id/eprint/55105 |
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