Effect of Substituting Sr²⁺ for Gd³⁺ on Structural and Magnetoelectric Properties of W-Type Hexaferrite

Abstract

Sr1-xGdxCo2Fe16O27-δ, (x = 0.05–0.20) was prepared via the proteic sol-gel process. Single-phase W-type hexaferrite doped with gadolinium was synthesized. The ferrite shows ferrimagnetic behavior with high saturation magnetization, low coercive field, low remnant magnetization, and a resistivity greater than 107 Ω·cm. The substitution of Sr2+ for Gd3+ improved the magnetoelectric properties of the ferrite owing to the increase in the concentration of Fe2+ and improvement of electron conduction.