Effect of ZrO2 and ZnO nanoparticles inclusions on superconductive properties of the melt-processed GdBa2Cu3O7−δ bulk superconductor

✍ Scribed by Y. Xu; A. Hu; C. Xu; N. Sakai; I. Hirabayashi; M. Izumi

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 236 KB
• Volume: 468
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2008.05.056

✦ Synopsis

Single domain Gd123 bulk superconductors have been fabricated successfully with doping both ZrO 2 and ZnO nanoparticles by a hot seeded melt growth in air. Superconductive properties were studied on the specimens selected from different positions of the domain separately, along the a-b plane and c-axis. The nanosized defects induced by the nanoparticles can be effective pinning center to enhance the J c of the bulk. Atomic substitution of Cu site with Zn ion enables us to enhance the J c but the substitution suppresses the T c of the bulk. By the analysis of the pinning force, for the specimens cut along the a-b plane, the dl pinning is enhanced by the addition of nanoparticles. While for the specimens cut along the c-axis, the dT c pinning is remarkably enhanced.