Progress in the Study of Vortex Pinning Centers in High-Temperature Superconducting Films

Abstract

Since the discovery of high-temperature superconductors (HTSs), significant progress in the fabrication of HTS films has been achieved. In this review, we intend to provide an overview of recent progress in how and why superconductivity can be enhanced by introducing nanoscale vortex pinning centers. The comprehensive control of morphology, dimension, orientation and concentration of artificial pinning centers (APCs) and the principle of vortex pinning are the focus of this review. According to the existing literature, HTSs with the best superconductivity can be obtained when one-dimensional (1D) and three-dimensional (3D) nanoscale APCs are combined for vortex pinning.

A review of vortex pinning in REBa2Cu3O7‐x coated conductors

“…Other studies have also explored the introduction of a second phase to enhance pinning performance, demonstrating the potential for significant advancements in superconducting materials. 17,[49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] Novel methods for second phase doping are also being developed. Recent efforts have aimed to refine the adjustable pinning landscape by controlling the nanoparticle size.…”

“…The morphology, size, orientation, and density of APCs can be meticulously manipulated using various methods. 17 In real-world scenarios, the success of vortex pinning is highly dependent on the microstructure, temperature, and magnetic field conditions. For instance, certain defects may be highly effective at low temperatures but less at higher temperatures or vice versa.…”

“…The morphology, size, orientation, and density of APCs can be meticulously manipulated using various methods 17 . In real‐world scenarios, the success of vortex pinning is highly dependent on the microstructure, temperature, and magnetic field conditions.…”

Effect of Er/Y addition on the growth and superconductivity of Bi2212 films

“…The property led scientists to search for forms of high-temperature superconductors with stronger current-carrying capacity by articially designing the shape, density and distribution of pinning centers. [24][25][26][27] Related studies have shown that the nanoscale second phase has superior properties J c values as a pinning center for superconductors. In contrast, the effect of doping of Er and Y elements on Bi2212 has rarely been investigated.…”

Enhanced critical current density in optimized high-temperature superconducting bilayer thin films

“…The value of J c,v can be substantially increased under high-field range by enhancing the vortex pinning via introduction of artificial pinning centers (APC) within the superconducting lattice [6]. This is typically done by adding a non-superconducting dopant material within a bulk superconductor and using it as a target for thin film manufacture via pulsed laser deposition (PLD).…”