Studies on fabrication of Ag/Tl2Ba2Ca2Cu3O10/CdSe heterostructures with electrochemical technique

The Ag/Tl2Ba2Ca2Cu3O10/CdSe heterostructure was fabricated at room temperature by soft electrochemical processing technique for the first time. The formation of the heterostructure with non-diffusive interfaces was confirmed by X-ray diffraction. The crystallite sizes determined for Tl-2223 and CdSe films were 33 nm and 25 nm, respectively. The Tl2Ba2Ca2Cu3O10 film electrodeposited onto Ag-substrate has shown the superconducting transition temperature Tc at 116.5 K and Jc = 2.1 × 103 A/cm2. These values were found to improve after the deposition of CdSe onto Ag/Tl-2223 films. The effect of red He-Ne laser irradiation on the superconducting properties of heterostructure are studied and discussed at length in this paper.