Supercond. sci. technol. Supercond. sci. technol. Transport and structural properties of MgB2/Fe wires produced by redesigning internal Mg diffusion process Yetis Hakan Avci Dogan Karaboga Firat Aksoy Canan Gajda Daniel Martínez Elena Mehmet Tanyildiz Fatih Zaleski Andrzej Babij Michal Tran Lan Maria Angurel Luis Alberto Universidad de Zaragoza Fuente G.F. de la Belenli Ibrahim Belenli 2022 research-article