Abstract Magnetodielectric (MD) materials have attracted considerable attention due to their intriguing physics and potential future applications. In this work, polycrystalline (1 − x)(Ba0.88Ca0.12)(Ti0.88Zr0.12)O3 − xCoFe2O4 (x = 0.10, 0.20, 0.30, 0.40) ceramic have been prepared via sol-gel method. The room temperature magnetic and ferroelectric behaviors of the synthesized composites were investigated. For the composite with x = 0.40, a MD ratio of 5.37% was achieved under a magnetic field of 1.5 T at f = 1 kHz. The measured “butterfly hysteresis” MD curves exhibit an obvious dielectric anomaly. Theoretical analysis suggests that the observed magnetodielectric effect is attributed to the magnetoresistance effect and magnetoelectric coupling.

中文翻译：

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(1-x)(Ba0.88Ca0.12)(Ti0.88Zr0.12)O3 − xCoFe2O4 中的磁介电效应

摘要 磁电介质 (MD) 材料因其有趣的物理特性和潜在的未来应用而引起了广泛关注。在这项工作中，通过溶胶-凝胶法制备了多晶 (1 - x)(Ba0.88Ca0.12)(Ti0.88Zr0.12)O3 - xCoFe2O4 (x = 0.10, 0.20, 0.30, 0.40) 陶瓷。研究了合成复合材料的室温磁性和铁电行为。对于 x = 0.40 的复合材料，在 f = 1 kHz 和 1.5 T 的磁场下实现了 5.37% 的 MD 比。测得的“蝴蝶滞后”MD 曲线表现出明显的介电异常。理论分析表明，观察到的磁介电效应归因于磁阻效应和磁电耦合。