The effect of crystal lattice disorder upon the conductivity of La0.67Ca0.33MnO3 films was studied. Lattice defects were introduced by irradiating the film with 6MeV electrons to a maximum fluence of about 2 x 1017/cm2. The comparatively low dose produced little radiation damage in the films. The number of displacements per atom in the irradiated samples was about 10-5. This nevertheless resulted in an appreciable increase in the film’s resistivity. The percentage of resistivity increase in the ferromagnetic metallic state below the Curie temperature was much greater than that observed in the insulating state (above the Curie temperature).

Influence of High-Energy Electron Irradiation on the Transport Properties of (La,Ca)MnO3 Films. B.I.Belevtsev, V.B.Krasovitsky, V.V.Bobkov, D.G.Naugle, K.D.D.Rathnayaka, A.Parasiris. European Physics Journal B, 2000, 15[3], 461-8