Non-resonant microwave absorption and critical current density in YBa2Cu3Ox films prepared by laser ablation

✍ Scribed by A. Morimoto; T. Matsuki; T. Minamikawa; T. Shimizu

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 526 KB
• Volume: 220
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90920-2

✦ Synopsis

High-quality YBa2Cu3Ox superconducting thin films have been prepared on ( 100)MgO substrates by the laser ablation technique, and characterized by non-resonant microwave absorption (NRMA) with a field modulation, magnetization and fourprobe measurements. The pinning properties derived from the NRMA spectra for various YBa2Cu30~ films are correlated with the critical current densities Jc. A relatively high-J c film prepared from YBa2Cu3Ox composition target using a Nd:YAG laser shows a derivative spectrum and a large hysteresis in the NRMA spectra. The highest-J, film prepared from an YBa2Cu40~ composition (YBa2Cu3Ox+CuO) target using an ArF excimer laser does not show a derivative NRMA spectrum, suggesting a strong pinning property.