Abstract
We investigated the effects of indium doping on the superconducting properties of YBCO sintered samples and thin films. In2O3-doped YBCO and YBa2Cu3−xInxOy sintered samples showed a gradual decrease in the critical temperature (Tc) with increasing indium content; however, a Tc value above 80K was maintained even up to 30vol.% addition and x=0.4, respectively. Ba3Cu3In4O12 was detected by X-ray diffractometry and energy-dispersive X-ray spectroscopy as a reaction product for both sintered samples. The normalized Jc under a magnetic field of 0.1T showed a maximum at x=0.3. Indium-doped YBCO films prepared by pulsed laser deposition showed a similar dependence of Tc on indium content as the sintered samples.
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