Effect of Mo-Substitution on Superconductivity, Flux Pinning and Critical Currents of la(1.5)Nd(0.5)Ca(1)Ba(2)Cu(5)O(z0

TL;DR

This study investigates how Mo substitution affects the superconducting properties, flux pinning, and critical currents in a specific triple perovskite superconductor, revealing a decrease in Tc and moderate flux pinning due to Mo-induced pinning centers.

Contribution

It provides new insights into the effects of Mo substitution on superconductivity, flux pinning, and critical current density in La-Nd-Ca-Ba-Cu-O compounds.

Findings

Tc decreases with increasing Mo content due to reduced hole concentration.

Mo substitution creates pinning centers, leading to moderate flux pinning.

Critical current density follows the flux creep model.

Abstract

Mo-substituted triple perovskite superconducting samples with the stoichiometric composition La(1.5)Nd(0.5)Ca(1)Ba(2)[Cu(1-x)Mo(x)](5)O(z), [LNCBCuMO] with x = 0.00, 0.01, 0.03, 0.05 and 0.10, have been investigated using X-ray diffraction, electrical resistivity, magnetic susceptibility, magnetization and oxygen content measurements. The observed reduction in Tc with increasing Mo content (x) in LNCBCuMO, can be attributed to the decrease in hole concentration. Magnetization measurements as a function of temperature and field (H), exhibit an M-H hysteresis loop, which indicates moderate flux pinning, which can be attributed to the pinning centers created by Mo substitution at Cu sites. The critical current density, Jc, deduced from the M-H data satisfies the flux creep model.