Enhancement of functional properties of V_0.6Ti_0.4 alloy superconductor by the addition of yttrium

We show here that the yttrium is immiscible and precipitates with various sizes in body centred cubic V$_{0.6}$Ti$_{0.4}$ alloy superconductor. The number size of are found to depend on amount added. Precipitates up 30~$\mu$m containing 5 at.\% yttrium. large line disorders generated by addition this be effective pinning magnetic flux lines. While superconducting transition temperature increases increasing alloy, critical current density maximum for 2 at. \% yttrium, where it more than 7.5 times parent fields higher 1~T. effectiveness each type defect lines dependent applied filed.