Abstract
Insulating films of In2O3 were prepared by sputtering indium in the presence of pure oxygen using dc magnetron sputtering. Transmission electron microscopic investigations showed the films to be single phase and polycrystalline. Analysis of the optical transmittance data showed the films to have an optical band gap of 3.71±0.01 eV. Tunnel junctions were made with high Tc superconductors Bi2Sr2Ca1Cu2Oy and NdBa2Cu3O7−δ using indium oxide as the barrier layer and Pb0.5In0.5 as the counter electrode. The conductance spectra displayed prominent structures attributable to energy gap. The reduced gap parameters for Bi2Sr2Ca1Cu2Oy and NdBa2Cu3O7−δ were found to be 4.0±0.5 and 5.2±0.6, respectively.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
