论文标题
钙钛矿氧化物薄膜中的单轴néel载体控制通过各向异性应变工程
Uniaxial Néel Vector Control in Perovskite Oxide Thin Films by Anisotropic Strain Engineering
论文作者
论文摘要
抗磁性薄膜通常表现出多域状态，并且对抗磁性néel载体的控制具有挑战性，因为抗铁磁材料对磁扰动是可靠的。通过依赖于原型抗铁磁材料的外延薄膜的各向异性内部应变工程，表现出单轴néel矢量控制。正骨（011） - 和（101）面向的Dysco3，GDSCO3和NDGAO3底物用于设计不同的各向异性内平面应变状态。各向异性的平面菌株稳定了结构单域单斜的LaFeo3薄膜。单轴néel载体沿拉伸拉伸的B轴发现，与沿较短的A轴具有néel载体的散装lafeo3相反，找不到磁性域。因此，各向异性应变工程是设计独特的功能响应的可行工具，进一步实现了用于中学设备技术的抗铁磁材料。
Antiferromagnetic thin films typically exhibit a multi-domain state, and control of the antiferromagnetic Néel vector is challenging as antiferromagnetic materials are robust to magnetic perturbations. By relying on anisotropic in-plane strain engineering of epitaxial thin films of the prototypical antiferromagnetic material LaFeO3, uniaxial Néel vector control is demonstrated. Orthorhombic (011)- and (101)-oriented DyScO3, GdScO3 and NdGaO3 substrates are used to engineer different anisotropic in-plane strain states. The anisotropic in-plane strain stabilises structurally monodomain monoclinic LaFeO3 thin films. The uniaxial Néel vector is found along the tensile strained b axis, contrary to bulk LaFeO3 having the Néel vector along the shorter a axis, and no magnetic domains are found. Hence, anisotropic strain engineering is a viable tool for designing unique functional responses, further enabling antiferromagnetic materials for mesoscopic device technology.
