Conveners
M3OrC - Focused Session: Latest Development in Flux Pinning III: Pinning, Critical Currents & Creep in HTS
- Hiroaki Kumakura (NIMS)
- Timothy Haugan (U.S. Air Force Research Laboratory)
Raising critical current density Jc in high temperature superconductors, such as YBa2Cu3O7 or RE-123 films, is important to performance-cost balanced conductor technology for commercialization. Development of strong nanoscale artificial pinning centers (APCs) in RE-123 films has led to significantly raised Jc in APC/RE-123 nanocomposites by enhanced pinning on magnetic vortices in moderate to...
An industrial R&D programme is ongoing at SuperOx, aimed at improving 2G HTS wire performance in magnetic field. We introduce perovskite artificial pinning centres into the HTS layer matrix. In contrast to most studies described in the literature, we use the high rate production processing parameters and PLD equipment at SuperOx Japan. This paper reports the results of Phase 1 of this...
Strong and isotropic vortex pinning landscape is demanded for high field applications of high temperature superconductor (HTS) thin film. Double-doping (DD) of different kinds of artificial pinning centers (APCs) has been identified as a promising approach to generate such a pinning landscape. This work presents a systematic study on the critical current density Jc(H, $\theta$) of 3%Y2O3+2-6...
After 25 years of development, several high-temperature superconductors (HTS) are becoming engineering materials commercially available as long-length wires. Among them, REBa2Cu3O6+y (REBCO, RE rare earth) compounds have emerged as excellent candidates for the manufacture of superconducting Coated Conductors (CCs) due to their high-field current carrying capacity. REBCO nanocomposites, based...
Pinning centers have been introduced into (Gd,Y)BCO to increase critical current density, Jc, for applications. However, in addition to generating high magnetic fields (by possessing high Jc in the magnet windings), magnets used in accelerators should generate homogeneous and time-invariant magnetic fields. Flux creep has been shown to be significant in high temperature superconductors even at...
Nb3Sn superconducting wires have been developed for nearly half a century and their record Jcs have plateaued since the early 2000s. The only opportunity for further significantly improving Jc of Nb3Sn conductors relative to the present state of the art lies in improving flux pinning capacity. In this talk efforts to improve pinning of Nb3Sn conductors by introducing additional pinning centers...
