Oxide‐Dispersion‐Driven Enhancement of Superconducting Performance of Mechanically Alloyed Nb₃Sn Bulk via Co‐Doping with Y₂O₃ and TiO₂

This study attempts to utilize the oxide dopants as dispersoids for Nb₃Sn superconducting bulk prepared through the mechanical alloying route. The functional behavior is characterized by the generation of artificial flux pinning centers (APCs) through cost‐effective nano oxide dispersoids. Further attempt is made to dope Y₂O₃ and TiO₂ simultaneously in Nb₃Sn. An influence of extended pinning is observed in this synergic‐doped sample due to combined pinning provided by magnetic κ TiO₂ pins and nonmagnetic Y₂O₃ APCs. Furthermore, an increase in the critical temperature, T_c by 2 K has been achieved for the co‐doped Nb₃Sn samples and 1 K each by individually doped samples with reference to pristine Nb₃Sn. At 2 T, the J_c for a co‐doped sample is 58% higher than the reference pristine Nb₃Sn, while Y₂O₃ doped shows 13% higher and TiO₂ doped shows 28% lower J_c than the reference. A comparable irreversibility field, B_irr values are evaluated using both the J_c extrapolation method and Kramer's plot.