Cooperative control of perpendicular magnetic anisotropy via crystal structure and orientation in freestanding SrRuO3 membranes

Flexible magnetic materials with robust and controllable perpendicular anisotropy (PMA) are highly desirable for developing flexible high-performance spintronic devices. However, it is still challenge to fabricate PMA films through current techniques of direct deposition on polymers. Here, we report a facile method synthesizing single-crystal freestanding SrRuO3 (SRO) membranes controlled crystal structure orientation using water-soluble Ca3-xSrxAl2O6 sacrificial layers. Through cooperative effect engineering, reveal tunable from in-plane our-of-plane remarkable energy 7.34*106 erg/cm3. Based the first-principles calculations, reveals that underlying mechanism modulation intimately correlated structure-controlled Ru 4d-orbital occupation, as well spin-orbital matrix element differences, dependent orientation. In addition, there no obvious changes magnetism after 10,000 bending cycles, indicating an excellent reliability in prepared films. This work provides feasible approach prepare oxide strong PMA.