Flux pinning properties and superconductivity of Gd-123 superconductor with addition of nanosized SnO2/ZrO2 particles

✍ Scribed by Caixuan Xu; Anming Hu; Naomichi Sakai; Mitsuru Izumi; Izumi Hirabayashi

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 313 KB
• Volume: 445-448
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2006.04.082

✦ Synopsis

By using top seeding melt-textured growth process, single domain bulk superconductor GdBa 2 Cu 3 O 7Àd (Gd-123) was prepared in air with variable additions of nanosized SnO 2 and ZrO 2 powders. The inhomogeneous distribution of Gd 2 BaCuO 5 particles was observed by scanning electron microscope study for each bulk with nanoparticles addition. A band structure composed by second phase free band, narrow second phase rich band and second phase diluted band was observed along both a-b plane and c growth sectors in the vicinity of seed site. At 77 K high critical current (J c ) was increased up to 99,300 A cm À2 under self-field in Hkc-axis configuration in Gd-123 bulk with 0.004 ZrO 2 addition, molar ratio to Gd-123. J c has a remarkable spacial distribution inside the samples while keeping T c almost stable for all addition quantities.