Magnetic properties of quadruple perovskite solid solutions Ca_1–xY_xCu₃Fe₄O₁₂ and Y_1–yCe_xCu₃Fe₄O₁₂

Magnetic properties of the quadruple perovskite solid solutions Ca_1–xY_xCu₃Fe₄O₁₂ and Y_1–yCe_yCu₃Fe₄O₁₂ are investigated. Ca_1–xY_xCu₃Fe₄O₁₂ shows continuous increase in the ferromagnetic transition temperature as x increases. Y_1–yCe_yCu₃Fe₄O₁₂ exhibits a ferromagnetic-antiferromagnetic transition in the vicinity of y = 0.5. These observations demonstrate the electron doping effect on magnetic properties of charge-disproportionated ACu₃Fe₄O₁₂ phases.