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HomeNano Hybrids and CompositesNano Hybrids and Composites Vol. 31Significance of Cobalt Ferrite Nanoparticles on...

Significance of Cobalt Ferrite Nanoparticles on Superconducting Properties of Tl-1212 High Temperature Superconductor

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Abstract:

Thallium-based high temperature superconductor (HTS) with nominal starting composition (Tl_0.85Cr_0.15)Sr₂CaCu₂O₇_-δ (Tl-1212) was prepared using high purity oxide powders via solid state reaction method. Small amounts (0.0 – 0.15 wt. %) of cobalt ferrite nanoparticles (CoFe₂O₄) were added into Tl-1212 superconductors. The effect of CoFe₂O₄ nanoparticles addition on the critical temperature (T_c), phase formation and microstructure properties including elemental compositional analysis were studied. The samples were investigated by the characterization of electrical resistance measurement, powder X-ray diffraction method (XRD), scanning electron microscopy and energy dispersive X-ray analysis (EDX). Zero-resistance temperature (T_c_-zero) was found to reduce from 97 K to 89 K with increasing of CoFe₂O₄ nanoparticles concentration. Most of the samples indicated a dominant Tl-1212 phase of a tetragonal structure with a minor phase of Tl-1201. SEM micrographs with EDX mapping showed that CoFe₂O₄ nanoparticles were well distributed in all the samples.

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Nano Hybrids and Composites Vol. 31

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Nano Hybrids and Composites (Volume 31)

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1-5

DOI:

https://doi.org/10.4028/www.scientific.net/NHC.31.1

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Online since:

February 2021

Authors:

Nurul Auni Khalid, Wei Kong*, Ing Kong, Cin Kong, Mohd Mustafa Awang Kechik, Roslan Abd-Shukor

Keywords:

Cobalt Ferrite Nanoparticles, Critical Temperature, Tl-1212 Superconductor

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