论文标题
磁性和电气传输特性的应变和电场控制磁性和电气传输特性
Strain and electric field control of magnetic and electrical transport properties in a magneto-elastically coupled Fe3O4/BaTiO3(001) heterostructure
论文作者
论文摘要
我们介绍了对电场诱导应变的控制对磁和电运输特性的应变的研究。在这个Fe3O4/batio3异质结构中，Fe3O4薄膜以双侧结构域的形式生长，类似于基础BATIO3（001）底物的A-C条纹结构域。通过原位电场依赖性磁化测量值，我们通过应变介质的纤维介导的纤维介质磁电磁耦合，证明了磁各向异性的外在控制和在20-300 K之间的外延FE3O4薄膜的特征性verwey金属绝缘体过渡。此外，我们观察到Fe3O4薄膜的磁性和电运输特性中的应变诱导的调节，跨热驱动的BATIO3底物的热驱动的固有铁电和结构相变。原位电场依赖性拉曼测量结果表明，一旦沉积后热力学稳定，电场并不能显着修改Fe3O4薄膜中的抗相距边界缺陷，并且磁性的修饰主要由应变诱导的晶格扭曲和磁性各向异性引起。这些结果提供了一个框架，以实现经典高度相关过渡金属氧化物中磁化的电气控制。
We present a study of the control of electric field induced strain on the magnetic and electrical transport properties in a magneto-elastically coupled artificial multiferroic Fe3O4/BaTiO3 heterostructure. In this Fe3O4/BaTiO3 heterostructure, the Fe3O4 thin film is epitaxially grown in the form of bilateral domains, analogous to a-c stripe domains of the underlying BaTiO3(001) substrate. By in-situ electric field dependent magnetization measurements, we demonstrate the extrinsic control of the magnetic anisotropy and the characteristic Verwey metal-insulator transition of the epitaxial Fe3O4 thin film in a wide temperature range between 20-300 K, via strain mediated converse magnetoelectric coupling. In addition, we observe strain induced modulations in the magnetic and electrical transport properties of the Fe3O4 thin film across the thermally driven intrinsic ferroelectric and structural phase transitions of the BaTiO3 substrate. In-situ electric field dependent Raman measurements reveal that the electric field does not significantly modify the anti-phase boundary defects in the Fe3O4 thin film once it is thermodynamically stable after deposition and that the modification of the magnetic properties is mainly caused by strain induced lattice distortions and magnetic anisotropy. These results provide a framework to realize electrical control of the magnetization in a classical highly correlated transition metal oxide.
