Three methods were used to introduce flux-pinning centers into Bi 2 Sr 2 CaCu 2 O x (Bi-2212) and TlBa 2 Ca 2 Cu 3 O x (Tl-1223) samples. It was found that carbon induced local decomposition, that nanosized Al 2 O 3 additions created stable reaction products, and that second phases could be isolated in Tl-1223 during synthesis. Each of these defects enhanced flux pinning and was of most benefit at temperatures ≤ 35K.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry