Electrical transport properties of bulk MgB2 materials synthesized by the electrolysis on fused mixtures of MgCl2, NaCl, KCl and MgB2O4

TL;DR

This study demonstrates the synthesis of bulk MgB2 via electrolysis of fused salts, revealing superconducting properties with a transition temperature around 37 K and providing key electrical parameters.

Contribution

It introduces a novel electrolysis method for producing MgB2 bulk materials and characterizes their superconducting electrical transport properties.

Findings

Superconducting transition at 37 K observed.

Upper critical field of 9.7 T determined.

Coherence length estimated at 5.9 nm.

Abstract

Electrolysis was carried out on fused mixtures of MgCl2, NaCl, KCl and MgB2O4 under an Ar flow at 600C. Electrical resistivity measurements for the grown deposits show an onset of superconducting transition at 37 K in the absence of applied magnetic field. The resistivity decreases down to zero below 32 K. From an applied-field dependence of resistivity, an upper critical field and a coherence length were calculated to be 9.7 T and 5.9 nm at 0 K, respectively.