Superconducting Properties of Combustion Synthesized MgB2

TL;DR

This paper reports the successful synthesis of MgB2 superconducting materials via combustion synthesis, demonstrating high critical current density and confirming superconductivity around 38K through magnetization measurements.

Contribution

First demonstration of MgB2 superconductors produced by combustion synthesis with detailed magnetic and structural characterization.

Findings

Superconducting transition temperature around 38K.

High critical current density of 2x10^6 A/cm2 at 5K under 1T.

X-ray diffraction confirms MgB2 phase presence.

Abstract

We have successfully prepared the MgB2 superconducting bulk and powdered materials by the method of combustion synthesis. The starting materials used in this study were powders of Mg and B. X-ray powder diffraction pattern was well assigned to the P6/mmm MgB2 phase. The temperature dependence of magnetization shows sharp superconducting transition around 38K. The critical current density can be estimated from the hysteresis of the magnetization curvature using the Bean's model. The powdered sample shows a high critical current density of 2x10^6 A/cm2 at 5K under the magnetic field of 1T.