Frank Stem
C R C Critical Reviews in Solid State Sciences
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.
Frank Stem
C R C Critical Reviews in Solid State Sciences
Oliver Schilter, Alain Vaucher, et al.
Digital Discovery
U. Wieser, U. Kunze, et al.
Physica E: Low-Dimensional Systems and Nanostructures
Lawrence Suchow, Norman R. Stemple
JES