Sharp Angular Sensitivity of Pinning Due to Twin Boundaries in Ba 2ycu3o7
We have measured the pinning force due to twin boundaries by measuring the magnetic torque produced when a field is applied perpendicular to the c axis and rotated with respect to the ab axes. At 76 K, the torque increases roughly fourfold, when the field is within 2°of the parallel to the twin boundaries. This peak is absent at 27 K. Irradiation with 5×101 6 cm-2 3.5 MeV protons increases the overall critical current and eliminates the peaks observed at 76 K.
MSU Digital Commons Citation
Gyorgy, E.Michael; Van Dover, Robert B.; Schneemeyer, Lynn; White, Alice E.; O'Bryan, H. M.; Felder, R. J.; Waszczak, Joseph V.; Rhodes, Warren W.; and Hellman, F., "Sharp Angular Sensitivity of Pinning Due to Twin Boundaries in Ba 2ycu3o7" (1990). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 459.