Magnetoelectric Composites yNi1−xCdxFe2O4 + (1 − y)Ba0.8Sr0.2TiO3 (x = 0.2, 0.4, 0.6; y = 0.15, 0.30, 0.45): Solution-Combustion Synthesis and Microwave Properties

Resumo

Magnetoelectric composites yNi_1−xCd_xFe₂O₄ + (1 − y)Ba_0.8Sr_0.2TiO₃ (x = 0.2, 0.4, 0.6; y = 0.15, 0.30, 0.45) were prepared by solution-combustion synthesis and characterized by XRD, SEM, and MW measurements. Low MW transmittance (about 0.15) was obtained at f = 8.5 GHz for composites with x = 0.6, y = 0.45. The MW reflectance did not show any dependence on Cd content x. The MW absorptivity levels-off at higher f. A maximum value of dielectric constant (about 42.6) is observed at f = 8.5 GHz for composites with x = 0.6, y = 0.45. Our composites seem promising for use in tunable microwave devices.