[22a-A304-1~9] 11.3 Critical Current, Superconducting Power Applications

[22a-A304-3] Magnetic Field and Angular Hysteresis Behaviors of Critical Current in the Multifilamentary Cu/Ag-Ba_1-xK_xFe₂As₂ Tapes

〇Junyi Luo¹, Tatsunori Okada¹, Satoshi Awaji¹, Cong Liu², Yanwei Ma² (1.Tohoku Univ., 2.Chinese Acad. of Scis.)

Keywords:iron-based superconductors, critical current, hysteresis

In this study, we focus on the flat-rolled 7-filamentary Cu/Ag-Ba122 tapes to find the current limiting factors and improve J_c. By examining the magnetic field and angular dependences of critical current I_c (I_c-B and I_c-θ), we analyzed the magnetic field and angular hysteresis behaviors of I_c in the samples. The complex hysteresis properties of I_c are considered to be dominated by the weak links in the plane and at the c-axis along with the field components at 0° (perpendicular) and 90° (parallel). In this presentation, we will illustrate the results about their contribution in detail.