A New Approach for the Fabrication of MgB2 Superconducting Tape with Large In-field Transport Critical Current Density

TL;DR

This paper introduces a novel MgB2 superconducting tape fabricated on a flexible metallic substrate, demonstrating high in-field critical current density and strong magnetic field performance suitable for magnet applications.

Contribution

The study presents the first successful fabrication of MgB2 tape on a flexible metallic substrate with enhanced in-field transport critical current density and magnetic field resilience.

Findings

Jc exceeds 10^5 A/cm^2 at 4.2K and 10T

Jc remains stable with minimal dependence on magnetic field up to 10T

Superconducting tape outperforms conventional Nb-Ti wires in magnetic fields

Abstract

The paper reports the first successful fabrication of MgB2 superconducting tape using a flexible metallic substrate as well as its strong pinning force, which was verified by direct measurement of transport critical current density. The tape was prepared by depositing MgB2 film on a Hastelloy tape buffered with an YSZ layer. The Jc of the tape exceeds 105A/cm2 at 4.2K and 10T, which is considered as a common benchmark for magnet application. The Jc dependence on magnetic field remains surprisingly very small up to 10T, suggesting that the tape has much better magnetic field characteristic than conventional Nb-Ti wires in liquid helium.