Abstract
The effect of LCMO addition in YBCO system to investigate changes in structure and transport properties is reported. Samples with addition of (La0.67Ca0.33MnO3)x (LCMO) (x=0.0-0.6) in YBa2Cu3O7-δ(YBCO) superconducting system were prepared via solid state reaction. The effect of magneto resistive components on the superconducting properties of YBCO was investigated through X-Ray diffraction (XRD), resistance-temperature (R-T) measurement, and Scanning Electron Microscope (SEM). XRD analysis showed the addition of LCMO (0.2 wt% - 0.6 wt%) formed four new phases. The crystal system still orthorhombic with space group Pmmm after addition 0.2 wt% and 0.4 wt% of LCMO but the crystal system was changed to tetragonal and space group P4/mmm when addition with 0.6 wt% of LCMO. The temperature dependent of electrical resistance showed the samples were metallic above the transition temperature even though after addition. TheTc(onset)superconducting transition temperature decreased from 84 K to 66 K while theTc (offset)decreased from 72°C to 54°C. This suppression was due to the magnetic behaviour of the LCMO. The average grain size decreased when addition with LCMO were increased.
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