A new method to determine the critical current density of superconducting thin films based on magneto-optic measurements

✍ Scribed by R. Knorpp; A. Forkl; H.-U. Habermeier; H. Kronmüller

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 723 KB
• Volume: 230
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90454-5

✦ Synopsis

Direct observation and measurement of the spatial flux density distribution on the surface of YiBa2Cu3OT_x superconducting thin films under application of an external magnetic field are performed using magneto-optical EuS/EuF2 and iron-garnet indicators. A new, very accurate method to determine the critical current density of stripe-structured thin films is presented, based on a recent theory for flux penetration in superconducting thin films.