Magnetodielectric Coupling in the Gd and Mg Co-Doped Y-Type Barium Ferrite
Ba2-xGdxZn2Fe12-xMgxO22(x=0.0,0.1,0.2,0.3)ferrite ceramics were synthesized by a sol-id-state reaction method.X-ray powder diffraction pattern and scanning electron microscopy results show that Gd and Mg doping reduce the ferrite lattice parameters and slightly change the morphology of ceram-ic.The dielectric parameters of the sample increase with the doping amount.The dielectric dispersion oc-curs at lower temperatures.The magnetodielectric phenomena above 50 K are caused by the joint action of electron jumping motion,magnetoresistive effect,and Maxwell-Wagner effect.The co-doping of gadolini-um and magnesium ions affects the magnetic structure to be non-collinear spin order,producing an intrin-sic magnetodielectric effect,especially in the sample of x=0.1.The research results provide fundamental value for magnetic dielectrics.
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