Good Day everyone! right now i'm searching for possible research in magnetoresistance properties of perovskite. So far, i already know the effect of Mn in Perovskite, it enhance the ferromagnetic properties of the material. And Manganites in Ferromagnetic State possessed magnetoresistance in magnetic field. So my question is if i increase the Mn content, what will happen to the magnetoresistance or to the resistivity of the materials? Gradually decreased? and why? Please provide Trusted Articles to support that data! thank you very much!