Effect of damage by 2MeV He ions on the normal and superconducting properties of magnesium diboride
Effect of damage by 2MeV He ions on the normal and superconducting properties of magnesium diboride
We have studied the effect of damage induced by 2MeV alpha particles on the critical temperature, Tc, and resistivity, ρ, of MgB2 thin films. This technique allows defects to be controllably introduced into MgB2 in small successive steps. Tc decreases linearly as the intragrain resistivity at 40K increases, while the …