"Sharp Angular Sensitivity of Pinning Due to Twin Boundaries in Ba 2ycu" by E.Michael Gyorgy, Robert B. Van Dover et al.
 

Sharp Angular Sensitivity of Pinning Due to Twin Boundaries in Ba 2ycu3o7

Document Type

Article

Publication Date

12-1-1990

Journal / Book Title

Applied Physics Letters

Abstract

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.

DOI

10.1063/1.103257

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