P. Alnot, D.J. Auerbach, et al.
Surface Science
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.
P. Alnot, D.J. Auerbach, et al.
Surface Science
Peter J. Price
Surface Science
Zelek S. Herman, Robert F. Kirchner, et al.
Inorganic Chemistry
A.B. McLean, R.H. Williams
Journal of Physics C: Solid State Physics