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 Nb 3 Sn 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 Y 2 O 3 and TiO 2 simultaneously in Nb 3 Sn. An influence of extended pinning is observed in this synergic‐doped sample due to combined pinning provided by magnetic κ TiO 2 pins and nonmagnetic Y 2 O 3 APCs. Furthermore, an increase in the critical temperature, T c by 2 K has been achieved for the co‐doped Nb 3 Sn samples and 1 K each by individually doped samples with reference to pristine Nb 3 Sn. At 2 T, the J c for a co‐doped sample is 58% higher than the reference pristine Nb 3 Sn, while Y 2 O 3 doped shows 13% higher and TiO 2 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.