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Preparation, patterning and critical current density of YBa2Cu3O7−δ thin films

✍ Scribed by C. Tome-Rosa; A. Walkenhorst; M. Maul; G. Jakob; H. Adrian; K. Haberle; P. Przyslupski; G. Adrian

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
348 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

Thin films of YBa2Cu307_S were prepared in-situ on SrTi0 3 , Zr02, LaGa03, Ah03 and (for the first time) NdAlCa04 substrates by dc-sputtering and laser ablation using stoichiometric ceramic targets. In case of SrTi0 3 single crystalline films with narrow transitions to superconductivity (boTe ~0.5K) in peT) and Xae(T) above 90K were obtained. With wet-chemically patterned films (linewidth lO/-lm) we determined critical current densities je (77K, B=O) up to 1.8• 10 6 A/cm 2 . The inductive Te-values achieved with films on other substrates are 86K (Zr02), 89K (LaGa03)' 89K (NdAICa04) and 85K (Ah03)' The growth and the microstructure of the YBa 2 Cu 3 07_5 films on these substrates has been studied by X-ray diffraction.

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Critical current behavior in narrow YBa2
Critical current behavior in narrow YBa2Cu3O7−δ thin films
✍ Shuichi Tahara; S.M. Anlage; Chang-Boem Eom; D.K. Fork; T.H. Geballe; M.R. Beasl 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 139 KB

Critical current measurements are reported for narrow strips ( down to -1.0 gm) of YBa2Cu 3 07\_ 8 thin films deposited and lithographically patterned by various means. A systematic increase in Uae critical current aensities is observed in tile narrowest strips, suggesting the possible presence of e