The preparation and the characterization of the 2212 phase in the Bi2Sr1.7CaGaxCu2-xOy system prepared by a solid- state reaction is reported. The dependence of the thermal, structural and superconducting properties on the Ga content is discussed. XRD data and SEM-EDX observations revealed the presence of Bi-Sr-Ca-Ga complex oxides in the Ga richer compounds. The electrical and magnetic measurements showed a single step as well as a broadening of the transitions width at an increase of the Ga content. The higher critical current density value (3.8×106 A cm-2 at 5 K for H = 2 KOe and 5.3 × 106 A cm-2 at 5 K H = 2 KOe for x = 0 and x = 0.8, respectively) found in the Ga doped sample has been explained as a direct consequence of a stronger pinning due to the presence of the Ga containing complex oxides.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering