Strain-Induced Magnetoelectric Coupling in Fe 3 O 4 /BaTiO 3 Nanopillar Composites

作者：Guohua Dong, Tian Wang, Haixia Liu, Yijun Zhang, Yanan Zhao, Zhongqiang Hu, Wei Ren, Zuo‐Guang Ye, Keqing Shi, Ziyao Zhou, Ming Liu, Jingye Pan · 发表于：ACS Applied Materials & Interfaces · 年份：2022 · DOI：10.1021/acsami.2c00058 · 被引用次数：17 · 研究领域：Multiferroics and related materials、Ferroelectric and Piezoelectric Materials、Magnetic and transport properties of perovskites and related materials

Magnetoelectric coupling properties are limited to the substrate clamping effect in traditional ferroelectric/ferromagnetic heterostructures. Here, Fe 3 O 4 /BaTiO 3 nanopillar composites are successfully constructed. The well-ordered BaTiO 3 nanopillar arrays are prepared through template-assisted pulsed laser deposition. The Fe 3 O 4 layer is coated on BaTiO 3 nanopillar arrays by atomic layer deposition. The nanopillar arrays and heterostructure are confirmed by scanning electron microscopy and transmission electron microscopy. A large thermally driven magnetoelectric coupling coefficient of 395 Oe °C –1 near the phase transition of BaTiO 3 (orthorhombic to rhombohedral) is obtained, indicating a strong strain-induced magnetoelectric coupling effect. The enhanced magnetoelectric coupling effect originated from the reduced substrate clamping effect and increased the interface area in nanopillar structures. This work opens a door toward cutting-edge potential applications in spintronic devices.