Characterization of the effect of ion irradiation on industrially produced GdBa2Cu3O7−δ superconducting tapes using a slow positron beam. (3rd December 2020)

• Record Type: Journal Article
• Authors: Yabuuchi, Atsushi; Ozaki, Toshinori; Sakane, Hitoshi; Okazaki, Hiroyuki; Koshikawa, Hiroshi; Yamamoto, Shunya; Yamaki, Tetsuya
• Is Part Of: Applied physics express. Volume 13:Number 12(2020)
• Publication Date: 2020-12-03
• Subjects: positron annihilation spectroscopy -- positron beam -- vacancy-type defect -- high-temperature superconductor -- ion irradiation -- pinning center; Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.35848/1882-0786/abcd72
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: To investigate the effect of irradiation-induced defects on the superconducting characteristics of industrially produced superconductor—GdBa2 Cu3 O7− δ (GdBCO)—coated conductors (CCs), we irradiated the GdBCO CCs with Au ions at 2 or 10 MeV and probed them using a slow positron beam. Vacancy clusters were detected in both unirradiated and irradiated GdBCO CCs. However, the effect of ion irradiation on the GdBCO CCs was characterized as a slight reduction in the positron annihilation rate with low-momentum electrons. We also found a correlation between the annihilation rate of low-momentum electrons and the superconducting transition temperature.