Title :
LaNiO/sub 3/: a promising material for contact with YBa/sub 2/Cu/sub 3/O/sub 7-x/ thin films
Author :
Kumar, D. ; Satyalakshmi, K.M. ; Hegde, M.S. ; Apte, P.R. ; Pinto, R.
Author_Institution :
Solid State & Structural Chem. Unit, Indian Inst. of Sci., Bangalore, India
Abstract :
Epitaxial LaNiO/sub 3/ metallic oxide thin films have been grown on c-axis oriented YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// thin films on LaAlO/sub 3/ substrates by pulsed laser deposition technique and the interface formed between the two films has been examined by measuring the contact conductance of the same. The specific contact conductance of the interface measured using a modified four probe method was found to be 1.4 to 6/spl times/10/sup 4/ ohm/sup -1/ cm/sup -2/ at 77 K. There are indications that contact conductance can be brought closer to that obtained for noble metal-YBCO interface.
Keywords :
barium compounds; contact resistance; high-temperature superconductors; lanthanum compounds; pulsed laser deposition; superconducting junction devices; superconducting thin films; yttrium compounds; 77 K; LaNiO/sub 3/-YBa/sub 2/Cu/sub 3/O/sub 7/; c-axis oriented thin films; contact conductance; epitaxial films; four probe method; metallic oxide thin films; pulsed laser deposition technique; Conductive films; Inorganic materials; Nonhomogeneous media; Pulse measurements; Pulsed laser deposition; Sputtering; Substrates; Temperature; Transistors; Yttrium barium copper oxide;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
