In this article, the estimation of current transfer length (CTL) and electric field of MgB₂ (M) monofilamentary superconducting wires for various metals which are used as a sheath and barrier with their different cross-sectional compositions of superconducting core/barrier/sheath are studied. Among the studied superconducting wires, the least CTL values are estimated for M/Ti/Ta (0.48 mm), M/Ti/Nb (0.51 mm) and M/Nb/Fe (0.50 mm) superconducting wires with thin barrier combinations. The estimated CTL values indicate that M/Ti/Nb and M/Nb/Fe monofilamentary superconducting wires are preferable as compared to M/Ta/Cu, M/Nb/Ni and M/Ta/Ni. The heat flux density generated on the metallic sheath is lower for the M/Ti/Nb and M/Nb/Fe superconducting wires i.e., lowest electrical dissipation as compared to the M/Ta/Cu and M/Nb/Ni superconducting wires. The lowest CTL value and heat generation make M/Ti/Nb and M/Nb/Fe a promising combination of superconducting wires for practical applications.

本文估算了MgB ₂的电流传输长度（CTL）和电场（M）研究了用于各种金属的单丝超导线材，它们被用作具有不同截面组成的超导芯/势垒/鞘的护套和势垒。在所研究的超导线中，具有薄势垒组合的M / Ti / Ta（0.48 mm），M / Ti / Nb（0.51 mm）和M / Nb / Fe（0.50 mm）超导线的CTL值最低。估计的CTL值表明，与M / Ta / Cu，M / Nb / Ni和M / Ta / Ni相比，M / Ti / Nb和M / Nb / Fe单丝超导线是优选的。M / Ti / Nb和M / Nb / Fe超导线在金属护套上产生的热通量密度较低，即，与M / Ta / Cu和M / Nb / Ni超导线相比，最低的电耗。