Magnetoelectric Coupling Effects in Tb-Doped BiFeO3 Nanoparticles

The magnetic, electric, and optical properties in Tb-doped BiFeO3 nanoparticles as functions of size doping concentrations were investigated using a microscopic model, taking into account both linear quadratic magnetoelectric (ME) coupling. We observed improved multiferroic band-gap tuning. magnetization polarization increased with the decreased nanoparticle Tb-doping substitution x. Neel temperature remained nearly unchanged whereas Curie was reduced There doping-induced ME dielectric constant is discussed function size, doping, magnetic field. band gap or Tb dopants due to competing effects compressive strain, oxygen defects on surface, Coulomb interactions. Increasing decreasing effect.