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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.
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http://dx.doi.org/10.3390/nano12224000 | DOI Listing |
Materials (Basel)
August 2025
Photovoltaic Technologies Laboratory, Department of Physics, Faculty of Fundamental Sciences, Vilnius Gediminas Technical University (Vilnius Tech), Saulėtekio av. 3, LT-10257 Vilnius, Lithuania.
The transport properties of biased type II superconductors are strongly influenced by external magnetic fields, which play a crucial role in optimizing the stability and performance of low-noise superconducting electronic devices. A major challenge is the stochastic behavior of Abrikosov vortices, which emerge in the mixed state and lead to energy dissipation through their nucleation, motion, and annihilation. Uncontrolled vortex dynamics can introduce electronic noise in low-power systems and trigger thermal breakdown in high-power applications.
View Article and Find Full Text PDFAdv Mater
August 2025
Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
Large lossless currents in high-temperature superconductors (HTS) critically rely on dense defects with suitable size and dimensionality to pin vortices, with dislocations being particularly effective due to their 1D geometry to interact extensively with vortex lines. However, in non-metallic compounds such as HTS with rigid lattices, conventional deformation methods typically lead to catastrophic fracture rather than dislocation-mediated plasticity, making it a persistent challenge to introduce dislocations at high density. Here, an asymmetric stress field strategy is proposed using extrusion to directly nucleate a high density of dislocations in HTS by activating shear-driven lattice slip and twisting under superimposed hydrostatic compression.
View Article and Find Full Text PDFNanoscale Horiz
June 2025
Institute of Spintronics and Quantum Information, Faculty of Physics and Astronomy, Adam Mickiewicz University Poznań, Uniwersytetu Poznańskiego 2, 61-614 Poznań, Poland.
This study investigates the nucleation, dynamics, and stationary configurations of Abrikosov vortices in hybrid superconductor-ferromagnet nanostructures subjected to inhomogeneous magnetic fields generated by a ferromagnetic nanodot. Employing the simulations based on time-dependent Ginzburg-Landau coupled with Maxwell's equations, we reveal the evolution of curved vortex structures that exhibit creep-like deformation before stabilizing. The interplay between vortices and currents confined within the superconducting nanoelement gives rise to unconventional stationary vortex arrangements, which evolve gradually with increasing magnetic field strength-a behavior absent in homogeneous fields.
View Article and Find Full Text PDFACS Nano
March 2025
Key Laboratory of Materials for High-Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.
Vector vortex beams with space-dependent phase distribution and polarization have been extensively studied for their various applications, such as optical imaging and communication. While conventional vortex beam lasers emit parallel light with phase singularities in real space, we here demonstrate a divergent vortex beam laser whose phase singularities are pinned to the featured azimuthal positions. The coherent beam was generated by the condensation of exciton-polaritons, hybrid quasi-particles from strongly coupled excitons and cavity-confined photons, in a CsPbBr microplatelet.
View Article and Find Full Text PDFNanomaterials (Basel)
February 2025
Department of Basic and Applied Sciences, A'Sharqiyah University, P.O. Box 42, Ibra 400, Oman.
This study investigates the thermal pinning and depinning behaviors of vortex domain walls (VWs) in constricted magnetic nanowires, focusing on the influence of intrinsic magnetic properties on VW stability under thermal stress. Using micromagnetic simulations, we analyze the roles of saturation magnetization (Ms), uniaxial magnetic anisotropy (Ku), and nanowire geometry in determining VW thermal stability. The modeled nanowire has dimensions of 200 nm (width), 30 nm (thickness), and a 50 nm constriction length, chosen based on the dependence of VW formation on nanowire geometry.
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