Synthesis and characterization of chromium-containing, thallium-based 1212 films

• Published in: Physica. C, Superconductivity Vol. 333; no. 3; pp. 221 - 228
• Main Authors: Lao, J.Y., Wang, J.H., Wang, D.Z., Tu, Y., Yang, S.X., Wu, H.L., Ren, Z.F., Verebelyi, D.T., Paranthaman, M., Aytug, T., Christen, D.K., Bhattacharya, R.N., Blaugher, R.D.
• Format: Journal Article
• Language: English
• Published: United States Elsevier B.V 01-01-2000
• Subjects: BARIUM OXIDES; CALCIUM OXIDES; CHROMIUM; COPPER OXIDES; High Jc; MATERIALS SCIENCE; SYNTHESIS; THALLIUM OXIDES; Thin films; TlCr-1212 superconductors; Thin films; High J c; 74.76.−w; 74.76.Bz; 74.62.Bf; 74.62.Dh; TlCr-1212 superconductors; 74.72.−h; 74.72.Fq
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/S0921-4534(00)00230-6

Epitaxial (Tl,Bi)Sr
2Cr
0.15Ca
0.85Cu
2O
y
[(Tl,Bi)-1212] films have been successfully grown on both LaAlO
3 and CeO
2/YSZ substrates by post-deposition annealing in flowing argon gas. These superconducting Tl-based, 1212-structured films on LaAlO
3 substrates have
T
c values in the range of 94–100 K, and
J
c values over 1.0×10
6 A/cm
2 at 77 K. The films are predominately 1212 phase, with excellent epitaxy as determined by XRD
θ–2
θ,
ω and
φ scans. The films on CeO
2/YSZ substrates have
T
c values in the range of 94–96 K,
J
c (77 K) values close to 6×10
5 A/cm
2 and excellent epitaxy on the CeO
2 buffer layers.