doi:10.1088/1361-6668/ac5339engYetis, HakanAvci, DoganKaraboga, FiratAksoy, CananGajda, DanielMartínez, ElenaMehmet Tanyildiz, FatihZaleski, AndrzejBabij, MichalTran, Lan MariaAngurel, Luis AlbertoFuente, G.F. de laBelenli, Ibrahim BelenliTransport and structural properties of MgB2/Fe wires produced by redesigning internal Mg diffusion processART-2022-128454We report transport, electromechanical, and structural properties of single core MgB2/Fe wire produced using a new fabrication method, called designed internal Mg diffusion (IMD) process, which relies on the use of non-stoichiometric Mg + B pellets with excess Mg in place of a central Mg rod used in the standard IMD method. Structural analysis revealed the successful formation of a porous MgB2 structure in the center and a dense circular MgB2 layer surrounding this structure in the designed-IMD wire. Fast transport I-V measurements showed that the designed IMD method increased engineering critical current density (J e) up to twice that of the IMD wires in self-field. The central porous MgB2 structure shared the applied current and indirectly behaved as an internal stabilizer against quench damage at high applied currents. © 2022 IOP Publishing Ltd.2022http://zaguan.unizar.es/record/13069510.1088/1361-6668/ac5339http://zaguan.unizar.es/record/130695oai:zaguan.unizar.es:130695info:eu-repo/grantAgreement/ES/DGA/T54-20Rinfo:eu-repo/grantAgreement/ES/MICINN/AEI/PID2020-113034RB-I00Superconductor Science and Technology 35, 4 (2022), [7 pp]by-nc-ndhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccess