REBCO coated conductors (CCs) are expected to be applied to various applications, including high-field magnets and compact fusion reactors. Fujikura has developed high-quality REBCO CCs and has evaluated their properties with a focus on their practical applications. Especially for coil applications of the REBCO CC, the in-field critical current (I_c) properties and mechanical properties of the CC are key factors. In this article, we focus on these properties and present recent evaluation results. Regarding the in-field I_c properties, typical properties and their variations are presented. In addition, a fitting function model for the in-field I_c is proposed. Regarding their mechanical properties, the tensile, fatigue, and delamination properties are discussed.

Since 2018, the rapid development of new technologies, particularly in the field of nuclear fusion, has increased the global demand for high-temperature superconductors (HTS) tenfold. During this period, Faraday Factory, Japan has become a leading company with an annual production of 3,000 km of HTS tape equivalent at a width of 4 mm. Because HTS tapes are used for a variety of applications, various properties are important: critical current, mechanical strength, geometry of the tape, uniformity along the tape length, and so on. The large-scale production and testing of thousands of samples have provided us with an opportunity to obtain a statistically validated understanding of these properties. In this article, we describe three types of HTS tapes produced by Faraday Factory Japan: Hermes, Mirai, and Electra. Finally, we provide examples of real-world applications made with our tapes.

SuperPower Inc., a subsidiary of Furukawa Electric Co., Ltd., is one of the pioneering manufacturers of second-generation high-temperature superconducting (2G-HTS) tape using metal-organic chemical vapor deposition (MOCVD). This article reviews the key characteristics of SuperPowerʼs 2G-HTS tapes, including the dependence of the critical current on magnetic field strength, temperature, and magnetic field orientation; their mechanical and electromechanical properties; the residual resistance ratio; and the solder-spliced connection resistance. The two primary 2G-HTS tape compositions named AP and HM, both incorporate artificial pinning centers, with the HM composition exhibiting superior performance at low temperatures and high magnetic fields. These findings serve as a practical reference for engineers and researchers developing superconducting magnets and related applications.