Multiferroics with strong magnetoelectric coupling can be created by improving the magnetostriction of the ferrite phase and combining it with the best-known piezoelectric. Herein, the ferromagnetic CoFe 2 O 4 was modified with Al incorporation further improve the resistivity, magnetic, and magnetostrictive properties and then combined with (0.5)Ba(Zr 0.2 Ti 0.8 )O 3 −(0.5)(Ba 0.7 Ca 0.3 )TiO 3 (BCZT) with different weight percentages. XRD results revealed the presence of a mixed spinel cubic phase for CAF ( Fd- 3 m ), whereas BCZT crystallized in a tetragonal structure ( Amm2 ) in composite systems. The dielectric response of the materials was studied using impedance spectroscopy and it displayed a typical Maxwell–Wagner polarization of two-phase composites. The magnetic response of the CAF sample improved significantly which is attributed to the preference of Al 3+ ions on tetrahedral sites. The magnetization of composites increased as the nonmagnetic BCZT component increased and the (0.75)CAF-(0.25)BCZT system had the highest saturation magnetization. We anticipate that these systems will have significantly improved magnetoelectric characteristics than unmodified CFO-BCZT systems.
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Hussain et al. (2024) studied this question.
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