TAPE BASE MATERIAL FOR A SUPERCONDUCTING WIRE ROD, AND SUPERCONDUCTING WIRE ROD

摘要

Provided is a superconducting wire rod that is reduced in cost due to a thinner/simpler middle layer, without the properties of the superconducting wire rod (for example critical current properties) being negatively affected. A provided tape-shaped base material for superconducting wire rods comprises a diffusion preventing layer, which comprises an oxide of a group 4 (4A) element, formed on a substrate that contains iron, nickel, or chromium. Specifically, the diffusion preventing layer comprises TiO 2 , ZrO 2 , or HfO 2 .