Study of Structural and Electrical Transport Property of YBCO+ BaTiO3-CoFe2O4 Superconductor

Abstract

Pristine YBa2Cu3O7-δ (YBCO) and Magnetoelectric composite BaTiO3-CoFe2O4 (BTO-CFO) samples are prepared by solid state route. Magnetoelectric (ME) materials are used as composite because of its advantageous properties. These materials are promising candidates for technological applications, since the multiferroic coupling allows the interconnection between magnetic and electric fields. New memory devices electrically written and magnetically read have been proposed that are based on ME materials. BaTiO3-CoFe2O4 composites are interesting magnetoelectric materials due to the individual properties of their components. CoFe2O4 has a spinel structure with large coercivity and magnetostriction. The tetragonal BaTiO3 is the most interesting due to its ferroelectric and piezoelectric properties.
XRD shows that all samples have orthorhombic phase at room temperature with a space group Pmmm without noticeable impurity peaks. The Resistivitry vs. Temperature was done by four probe method. It is found that by increasing the wt.% of BTO-CFO in the YBCO matrix the transition temperature (TC) decreases gradually.