Frequency dependent irreversibility line and undirectional magnetic anistrophy in thin YBa2Cu3O7−x films irradiated with heavy ions

1994 
Abstract We study the influence of irradiation with Pb and Xe ions on the magnetic properties of thin YBa 2 Cu 3 O 7−x films. Using analysis of scaled pinning force we found unidirectional magnetic anisotrophy in the case of Pb irradiation. For Xr irradiated samples, such anistrophy was not found. The irreversibility lines and their frequency dependencies vary with the type of defects and the direction of the external magnetic field.
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