superconductor*

Zero field London penetration depth, λ_L(T) and Campbell penetration depth, λ_C(T) were measured

in both pristine and electron-irradiated samples of single crystals Ca₃(Ir,Rh)₄Sn₁₃ using a tunnel diode resonator (TDR). The rate of T_C suppression and low-temperature London penetration depth were analyzed to understand the superconducting gap structure. The Campbell penetration depth was used to extract true (relaxation-free) critical current density as a function of temperature and magnetic field. The results and the constructed vortex phase diagram are compared between the pristine and irradiated samples, as well as with conventional measurements. The observed peak-effect, induced electron irradiation, implies its static origin and signifies a crossover in the pinning mechanism.