Observation of Flux Density Distribution in YBa2Cu3Ox Superconductor Thin Film Using Bi-Substituted Iron Garnet Film

• Published in: IEEE translation journal on magnetics in Japan Vol. 7; no. 7; pp. 533 - 538
• Main Authors: Hasumi, Y., Yokoyama, Y., Obara, H., Suzuki, Y., Katayama, T.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.1992; Institute of Electrical and Electronics Engineers
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Ferrimagnetic films; Garnet films; Iron; Magnetic field measurement; Magnetic films; Magnetization; Physics; Properties of type I and type II superconductors; Superconducting films; Superconducting materials; Superconducting thin films; Superconductivity; Yttrium barium copper oxide; Thickness; Flux line; Temperature; Thick film; Transition metal Compounds; Magnetic domain; Magnetic hysteresis; Measurement method; Experimental study; Barium Copper Yttrium Oxides Mixed; High temperature superconductor; Inorganic compound
• ISSN: 0882-4959; 2375-0545
• DOI: 10.1109/TJMJ.1992.4565443

Bi-substituted iron garnet film with a large Faraday rotation and perpendicular magnetization was prepared, and the film domain patterns were used to observe the flux penetrating superconducting YBa 2 Cu 3 O x thin films. Observations were performed for both square and disk-shaped YBa 2 Cu 3 O x films. The penetration behavior depends on defects and the shape of the film. We confirmed that the flux density in superconducting film as observed through the iron garnet film domain patterns was nearly the same as that estimated from the sample magnetization.