Formation of submicron-thick oxide barrier for reducing AC loss in multifilamentary Bi2223 tapes

• Published in: IEEE transactions on applied superconductivity Vol. 15; no. 2; pp. 2875 - 2878
• Main Authors: Osamura, K., Wada, N., Ogawa, T., Nakao, F.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-06-2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: AC loss; Applied sciences; barrier; Barriers; BSCCO2223; Core loss; Electrical engineering. Electrical power engineering; Electronics; Exact sciences and technology; Inorganic materials; Magnesium; MAGNESIUM OXIDE; Materials; Multifilamentary superconductors; Oxidation; OXIDES; Precursors; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Silver; Superconducting devices; Superconducting epitaxial layers; Superconducting films; Superconducting materials; Superconducting tapes; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TAPE; Temperature; Wire; Ultrathin films; Deformation; barrier; Superconducting tapes; BSCC02223; Ductile material; Oxidation; Mg; AC losses; Composite superconductor; AC loss; Multifilamentary superconductor
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2005.848252

Barrier surrounding oxide superconducting core is effective in reducing AC loss of the multifilamentary tape. Metallic magnesium was chosen as its precursor material. Through the ordinary deformation process to fabricate the tape, the magnesium layer was easily thinned up to sub-micron. By the successive oxidation treatment, the barrier became a stable MgO layer. Usefulness of ductile material has been demonstrated to produce ultra-thin barrier.