Anisotropy and flux pinning in YBa2Cu3O7-x crystals with varying twinning plane densities

✍ Scribed by R.B. Flippen; T.R. Askew; Ruixing Liang

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 365 KB
• Volume: 231
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)90644-0

✦ Synopsis

Magnetic flux penetration in high-temperature superconductors is affected by both anisotropic structure and the presence of flux pinning mechanisms. An AC inductance technique is described which is sensitive to flux penetration in superconductors as a function of field orientation. Results of such measurements for YBa2Cu3OT_ x crystals are shown to be sensitive to the amount of flux pinning present in individual crystals and the direction of the applied field. Twinning planes are shown to be a major source of such pinning in YBa2CuaOT_x. Possible explanations for pinning by this mechanism are considered.