Abstract
Thin films of (La,Ba)MnO
3 are prepared with a supply of oxygen molecules or plasma at various partial pressures. Magnetic properties of the films are investigated by measuring the magnetic susceptibilities and the resistivities, and by ferromagnetic resonance. One of the film shows a Curie transition at 174
K and a metal–insulator transition at 84.2
K. Magnetic homogeneity is studied in relation to the preparation condition.