Effect of (La_0.67Ca_0.33MnO₃)x (x = 0.0 – 0.6) Addition in YBa₂Cu₃O_7-δ System on the Structure and Transport Properties

Abstract:

The effect of LCMO addition in YBCO system to investigate changes in structure and transport properties is reported. Samples with addition of (La_0.67Ca_0.33MnO₃)x (LCMO) (x=0.0-0.6) in YBa₂Cu₃O_7-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. The T_c(onset) superconducting transition temperature decreased from 84 K to 66 K while the T_{c (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.

• Periodical: Advanced Materials Research (Volume 501)
• Pages: 314-318
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.501.314
• Online since: April 2012
• Authors: B.N. Fadilah, S.A. Halim, M. Hashim
• Keywords: Addition, Resistance, Solid-State Reaction, Superconducting, Transition Temperature

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