Multiferroism and colossal magneto-capacitance effect of La0.2Pb0.7Fe12O19 ceramics

Colossal magnetocapacitance effect of the La0.2Pb0.7Fe12O19 ceramic: Oscillation of relative dielectric constant (or capacity) with magnetic field for the polycrystalline La0.2Pb0.7Fe12O19 ceramics at room temperature, the insets display the cycloid conical spin structures with positive Mc (left) and negative Mc (right), Mc is the spin-current induced polarization.274