Heterostructure with a symmetry-mismatched interface provides a promising playground for the exploration of emergent phenomena. Herein, we report a systematic investigation on La_2/3Sr_1/3MnO₃/YBaCo₂O_5+δ (LSMO/YBCO) grown on SrTiO₃, a heterostructure formed by perovskite oxides of different symmetry. A high-resolution lattice image shows the formation of high-quality perovskite LSMO and A-site cation-ordered oxygen-deficient double perovskite YBCO, without any signatures of atomic reconfiguration at the interface. Surprisingly, the YBCO-buffered LSMO exhibits perpendicular magnetic anisotropy (PMA), though bare LSMO film is in-plane anisotropic. The PMA is robust, appearing even when the thickness of YBCO is only one unit cell. The typical anisotropy constant is ∼4 10⁶ erg cm⁻³. X-ray absorption spectroscopy analysis reveals a preferential occupation of the orbital compared with , which is confirmed by density functional theory calculations. This orbital reconstruction accounts for the PMA. The formation of a covalent bond between Mn and Co caged by different oxygen polyhedrons, an octahedron and a square pyramid, respectively, stabilizes the orbital reconstruction, resulting in anomalous spin orientation.

具有不对称对称界面的异质结构为探索新兴现象提供了广阔的前景。在此，我们报告了在SrTiO _3上生长的La _2/3 Sr _1/3 MnO ₃ / YBaCo ₂ O _{5+ δ} （LSMO / YBCO）的系统研究。，是由不同对称的钙钛矿氧化物形成的异质结构。高分辨率晶格图像显示了高质量钙钛矿LSMO和A位阳离子序缺氧的双重钙钛矿YBCO的形成，界面上没有任何原子重配置的迹象。出乎意料的是，尽管裸露的LSMO膜是面内各向异性的，但YBCO缓冲的LSMO却表现出垂直磁各向异性（PMA）。PMA坚固耐用，即使YBCO的厚度仅为一个晶胞时也会出现。典型的各向异性常数为〜4 10 ⁶ erg cm ^-3。X射线吸收光谱分析显示与，这已通过密度泛函理论计算得到证实。轨道重建是PMA的原因。分别由不同的氧多面体，八面体和四棱锥笼罩的Mn和Co之间的共价键的形成稳定了轨道的重构，导致反常的自旋取向。