Highly oriented Y1Ba2Cu3O7 thin films prepared in situ by vacuum co-evaporation

✍ Scribed by Š. Chromik; V. Štrbík; F. Hanic; V. Šmatko; R. Adam; Š. Beňačka

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 383 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80332-3

✦ Synopsis

The thin films YBa?Cu 3 0 7 have been prepared on single crystal (100)-SrTi0 3 and ( 200)-MgO substrates by vacuum co-evaporation of Y, BaF2 and Cu. The substrate temperature and total film thickness have been 650-700 0 C and 150 nm, respectively. The X-ray diffraction, scanning electron microscopy and low-temperature electrical measurements show that prepared films are highly c-axis oriented perpendicular to the substrate, the ons~t.critical tempera~ure.Ton ~90 K, zero-resistance critical temperature is T co = 85 K, and critical current denSity Jc~3xl0 5 A/cm 2 at 4.2 K and zero magnetic field.