Title :
Growth of superconducting Hg-1212 very-thin films
Author :
Fang, L. ; Yan, S.L. ; Aytug, T. ; Gapud, A.A. ; Kang, B.W. ; Xie, Y.Y. ; Wu, J.Z.
Author_Institution :
Dept. of Phys. & Astron., Kansas Univ., Lawrence, KS, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
High quality epitaxial HgBa/sub 2/CaCu/sub 2/O/sub 6+/spl delta// (Hg-High 1212) films with thickness less than 100 nm have been successfully synthesized using a cation-exchange process. The films show the superconducting transition up to /spl sim/118 K which is close to the intrinsic value of 124 K for the Hg-1212 phase, and critical current densities up to 1.1/spl times/10/sup 7/A/cm/sup 2/ at 5 K, 1.14/spl times/10/sup 6/A/cm/sup 2/ at 77 K and 2.59/spl times/10/sup 5/A/Vcm/sup 2/ at 100 K in zero field.
Keywords :
barium compounds; calcium compounds; critical current density (superconductivity); high-temperature superconductors; ion exchange; mercury compounds; superconducting epitaxial layers; superconducting transition temperature; 100 K; 118 K; 5 K; 77 K; Hg-1212; HgBa/sub 2/CaCu/sub 2/O/sub 6+/spl delta//; HgBa/sub 2/CaCu/sub 2/O/sub 6/; cation-exchange process; critical current density; epitaxial films; film thickness; superconducting transition; very thin film growth; Annealing; Critical current density; High temperature superconductors; Magnetic films; Mercury (metals); Optical films; Sputtering; Superconducting epitaxial layers; Superconducting films; Superconductivity;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
