Thomas E. Karis, C. Mark Seymour, et al.
Rheologica Acta
To enhance vortex pinning in the high-Tc superconductor Bi2Sr2CaCu2O8, single crystals were irradiated with energetic heavy ions to create columnar defects. Irradiations were made at various angles from the c-axis. The pinning energy U0 was investigated by ac magnetometry near B(Tirr), the limit of quasistatic magnetic irreversibility. Irradiation increased U0 by a factor of ∼3, relatively independent of the ion-beam exposure, which increased both Jc and the irreversible BT regime. Independence of Jc and U0 from the magnetic-field orientation suggests the predominance of strong pins interacting with 2-D pancake vortices. © 1994.
Thomas E. Karis, C. Mark Seymour, et al.
Rheologica Acta
Ronald Troutman
Synthetic Metals
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
Sharee J. McNab, Richard J. Blaikie
Materials Research Society Symposium - Proceedings