{'fraction_non_alphanumeric': 0.019310344827586208, 'fraction_numerical': 0.009655172413793104, 'mean_word_length': 5.54054054054054, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Anomalous magnetoresistance of ultrathin films of DyBa2Cu3O7-x near the superconductor-insulator transition.

An anomalous peak in the magnetoresistance was observed in granular ultrathin films of DyBa 2 Cu 3 O 7-x whose low-temperature behaviors span the zero-field superconductor-insulator transition. The magnitude of this peak increased with the weakening of the superconductivity of the films. Frustration effects in a Josephson coupled superconducting array are not sufficient to account for the peak. Instead, this unusual behavior may result from an interaction of the carriers with antiferromagnetically ordered Cu 2+ ions on the copper-oxygen sheets, providing a crucial link between superconductivity and magnetism