Amorphous and Crystalline Magnetic/Superconducting Hybrids: Interplay Between Periodic Defects and Random Defects

• Published in: IEEE transactions on applied superconductivity 2011-06, Vol.21 (3), p.2597-2600
• Main Authors: Gomez, A, Perez de Lara, D, Gonzalez, E M, Alija, A, Martin, J I, Velez, M, Vicent, J L
• Format: Article
• Language: English
• Subjects: Amorphous magnetic materials; Applied sciences; Arrays; Crystal defects; Driving; Dynamics; Electrical engineering. Electrical power engineering; Electrical machines; Electromagnets; Electronics; Exact sciences and technology; Fluid flow; Lattices; Magnetosphere; Nanotechnology; Nickel; Niobium; Regulation and control; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Silicon; Superconducting devices; superconducting films; Superconducting magnets; Superconductivity; Various equipment and components; Vortices
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2010.2089952

Arrays of nanometric Ni dots embedded in amorphous Mo 3 Si ( a -Mo 3 Si) or crystalline Nb superconducting films modify the vortex lattice dynamics and the dissipation mechanisms, close to critical temperatures. The vortex lattice force vs. velocity characteristics have been measured in both hybrids. The velocities of the ordered and synchronized vortices are the same in both systems (hybrids based on Nb films or a -Mo 3 Si films), but remarkably the needed driving forces are one order of magnitude smaller in a -Mo 3 Si hybrids than in Nb based hybrids. This experimental behavior points out magnetic/superconducting hybrids, based on amorphous superconductors films, could be a promising material for controlling vortex motion with very low driving forces.