论文标题
通过ba-ba-ba-ublebubsubtitution调整外延SRRUO3的结构，传输和磁性
Tuning Structural, Transport and Magnetic Properties of Epitaxial SrRuO3 through Ba-Substitution
论文作者
论文摘要
由于晶体结构的微妙相互作用和电子自由度的自由度，钙钛矿截风形酸盐（AruO3，A = Ca，ba或sr）具有独特的特性。在这里，我们证明了从正栓到四方到四方（无八面体旋转）相的晶体对称性的连续调整，这是通过BA-替代实现的（SR1-XBAXRUO3，具有0 <x <0.7）。对SRRUO3的初始BA固定不仅改变了铁磁特性，而且还通过使Ru-O-Ru键角（至180°）来调整垂直的磁各向异性，从而导致最大居里温度和x = 0.20的RUO6旋转量的灭绝。对于X> 0.2，RUO6八面体旋转失真的抑制主要增强了系统中的铁磁磁化，尽管与RUO6四方变形的影响竞争。进一步增加X> 0.2逐渐增强了四方型失真，从而导致RU-4D轨道占用率和抑制铁磁性的抑制。我们的结果表明，A位置阳离子的ISOLARET替代显着和控制地影响了钙钛矿氧化物的电子和磁性。
The perovskite ruthenates (ARuO3, A = Ca, Ba, or Sr) exhibit unique properties owing to a subtle interplay of crystal structure and electronic-spin degrees of freedom. Here, we demonstrate an intriguing continuous tuning of crystal symmetry from orthorhombic to tetragonal (no octahedral rotations) phases in epitaxial SrRuO3 achieved via Ba-substitution (Sr1-xBaxRuO3 with 0 < x < 0.7). An initial Ba-substitution to SrRuO3 not only changes the ferromagnetic properties, but also tunes the perpendicular magnetic anisotropy via flattening the Ru-O-Ru bond angle (to 180°), resulting in the maximum Curie temperature and an extinction of RuO6 rotational distortions at x = 0.20. For x > 0.2, the suppression of RuO6 octahedral rotational distortion dominantly enhances the ferromagnetism in the system, though competing with the impact of the RuO6 tetragonal distortion. Further increasing x > 0.2 gradually enhances the tetragonal-type distortion, resulting in the tuning of Ru-4d orbital occupancy and suppression of ferromagnetism. Our results demonstrate that isovalent substitution of the A-site cations significantly and controllably impacts both electronic and magnetic properties of perovskite oxides.
