A novel quasi 1–2 type magnetoelectric (ME) nanocomposite films composted of one‐dimensional CoFe2O4 nanofibers and two‐dimensional PbZr0.2Ti0.8O3 films on flexible mica substrate have been designed and fabricated. The ME coupling effects have been greatly enhanced due to the release of the clamping effect and the high strain transfer efficiency between the large aspect ratio of the nanofibers and ferroelectric thin films. The release of the clamping effect was confirmed by reducing the thickness of the mica substrate, in which the piezoelectric coefficient and ME coupling coefficient of the nanocomposite films have been greatly boosted by the decrease in the mica thickness. A large direct ME coupling coefficient of 630 mV/(cm Oe) and a converse ME coupling coefficient of 1.43 × 10−8 s/m have been achieved in the quasi 1–2 nanocomposite film with a substrate thickness of 25 µm. Furthermore, the stain‐mediated ME coupling was revealed by magnetic field/electric field‐induced local ferroelectric/magnetic domain switching dynamics.

中文翻译：

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云母基底上准 1-2 纳米复合薄膜的大室温磁电响应

由一维 CoFe 组成的新型准 1-2 型磁电 (ME) 纳米复合薄膜2氧4纳米纤维和二维PbZr0.2钛0.8氧3柔性云母基板上的薄膜已被设计和制造。由于钳位效应的释放以及大长径比的纳米纤维与铁电薄膜之间的高应变传递效率，ME耦合效应大大增强。通过减小云母基底的厚度证实了夹紧效应的释放，其中纳米复合薄膜的压电系数和ME耦合系数因云母厚度的减小而大大提高。630 mV/(cm Oe) 的大直接 ME 耦合系数和 1.43 × 10 的逆 ME 耦合系数−8s/m 已经在基底厚度为 25 µm 的准 1-2 纳米复合薄膜中实现。此外，磁场/电场诱导的局部铁电/磁畴切换动力学揭示了染色介导的 ME 耦合。