Anisotropy, Magnetostriction and Converse Magnetoelectric Effect in Dy Substituted Ni Ferrite

NiFe2-xDyxO4 (x = 0, 0.1) compounds were prepared by solid state reaction. Room temperature X-ray diffraction confirmed the formation of the compounds in cubic inverse spinel phase with the space group Fd3m. Increments in the lattice constant were observed upon partial substitution of Fe3+ by Dy3+. While both magnetization and cubic magnetocrystalline anisotropy (K1) decreased with increasing temperature, with Dy3+ substitution, at any given temperature the magnetization decreased and K1 increased. A quantitative observation of direct magnetoelectric (DME) effect and qualitative observation of converse magnetoelectric (CME) effect in NiFe1.9Dy0.1O4 compound, describe its multiferroic nature.