Conveners
M3Or4O: Latest Development in Flux Pinning & Critical Current - REBCO II
- Judy Wu (University of Kansas)
- Eric Hellstrom (ASC / Florida State University)
Using 4-µm-thick REBCO film and optimal film composition, we had demonstrated critical currents as high as 1,836 A/4mm at 4.2 K, 20 T (Jc = 11.5 MA/cm2). Recently, we scaled up this process to 50-m-lengths to achieve 1,274 A/4 mm at 4.2 K, 20 T (Jc = 8 MA/cm2) which about 70% of the short-sample champion value. Achieving uniform, repeatable and high in-field critical current over long tape...
In addition to naturally induced pinning centers in $RE$Ba$_{2}$Cu$_{3}$O$_{7−\delta}$ coated conductors ($RE$BCO-CCs), such as blocking layers and stacking faults act as planer pins, minor-phase precipitates and oxygen defects act as coarse and fine spherical pins, an introduction of fine pinning centers plays a crucial role for improving the critical current density Jc characteristics of...
Nonlinear electrical transport is an indispensable tool to study disorder, dimensionality, criticality, and vortex physics for fundamental research on new types of superconductors and technological applications. Because a significant portion of many superconducting phase diagrams occurs at very high magnetic fields ($\it{H}$) only accessible by pulsed field magnets, there is a need to develop...
Artificial pinning centers (APCs) of varying types and nano-scale size have been successfully introduced into (Y,RE)Ba2Cu3O7-x (Y,RE-BCO, (Y,RE)BaCuO, YBaCuO or YBCO) thin film superconductors by different processing methods in order to strongly and collectively pin quantized vortices. A number of high quality reviews of this large field have been published that describe progress in the...
