Flux pinning properties in high magnetic field and low temperature of SmBa2Cu3Oy thin films

✍ Scribed by Y. Ichino; Y. Yoshida; M. Miura; Y. Takai; K. Matsumoto; M. Mukaida; A. Ichinose; S. Horii; S. Awaji; K. Watanabe

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 170 KB
• Volume: 463-465
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2007.03.464

✦ Synopsis

We have studied SmBa 2 Cu 3 O y (Sm123) thin films fabricated by low temperature growth (LTG) technique. The critical current densities (J c s) in magnetic fields at 77 K of the LTG-Sm123 film embedded nanosized low-T c particles (NLP) were comparable to that of NbTi wire at 4.2 K. Furthermore, at low temperatures of 65 and 40 K, the J c -B curves of the LTG-Sm123 film were superior to even that of Nb 3 Sn wire at 4.2 K and the anomalous peaks were observed on the J c -B and F p -B curves. Based on the scaling of the flux pinning force, we found that fluxes in the film would be pinned at grain boundary mainly and the anomalous peaks were caused by the NLP.