{'fraction_non_alphanumeric': 0.016923076923076923, 'fraction_numerical': 0.003076923076923077, 'mean_word_length': 5.320388349514563, '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}}
Preparation of YBaCuO Films by Polarized Plasma Oxidation of Multilayered Films

YBaCuO superconducting thin films were prepared by oxidizing the multilayered thin films composed of Ba, Y2O3 and Cu in the oxygen-helium plasma. The superconductive properties of these films were found to be strongly dependent on the DC bias applied to the substrate during plasma oxidation. The negative bias increases the c-axis-preferred orientation, whereas the oxidation proceeds more easily under the positive bias. Therefore, the combination of both negative and positive bias is of great advantage to the preparation of high-quality superconducting thin films.