Angular dependence of the Hall conductivity in YBa2Cu3Ox films with columnar defects

Abstract

We have studied the role of strong pinning on the Hall conductivity by measuring the angular dependence of the longitudinal and the Hall resistivity of YBa2Cu3Ox films with columnar defects. The resulting Hall conductivity \sigma(xy)\ of irradiated films shows a sharp increase with decreasing temperature when an external magnetic field is aligned parallel to the columnar defects, a strong pinning configuration, whereas \sigma(xy)\ of unirradiated films shows a broad minimum in the same orientation. This distinctive difference demonstrates the pinning dependence of the Hall conductivity; [S0163-1829(98)04446-4].