[12a-N402-1~11] 11.2 Thin and thick superconducting films, coated conductors and film crystal growth

[12a-N402-8] Asymmetric Critical Current in Commercial REBa₂Cu₃O_y Tapes

〇Yuji Tsuchiya¹, Akihiro Tsuruta², Toshinori Ozaki³ (1.Nagoya Univ., 2.AIST, 3.Kwansei Gakuin Univ.)

Keywords:high temperature superconductor, Y-based cuprate superconductor, critical current

Superconducting diodes with different critical currents I_c depending on the current direction have been proposed. In this study, we focused on a commercial REBCO tape, which is expected to be used for power devices at liquid nitrogen temperature, and investigated its I_c asymmetry in detail in a wide range of temperature and magnetic field. As a result, the asymmetricity of I_c was found to be maximum in a low magnetic field of about 0.1 T at 77 K. We will discuss the application of superconducting diodes and the origin of the asymmetry.