Role of dislocations on the formation of the Abrikosov lattice in Nb superconductor

✍ Scribed by S. Horiuchi; M. Cantoni; M. Uchida; T. Tsuruta; Y. Matsui

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 305 KB
• Volume: 30
• Category: Article
• ISSN: 0968-4328
• DOI: 10.1016/s0968-4328(99)00049-9

✦ Synopsis

Quantized magnetic flux lines (vortices) in superconducting Nb foils were directly observed with various externally applied magnetic fields in a cryo-Lorentz electron microscope. The interaction between vortices and dislocations was examined; edge-on dislocations weakly pin individual vortices at magnetic fields below 100 G. In higher magnetic fields the formation of a regular hexagonal vortex lattice starts preferentially at in-plane dislocations. At 200 G small domains of the Abrikosov vortex lattice is formed. Based on these observations the mechanism for the formation of the Abrikosov lattice is proposed.