Flexible magnetic materials with robust and controllable perpendicular magnetic anisotropy(PMA)are highly desirable for developing flexible high-performance spintronic devices.However,it is still challenge to fabricat...Flexible magnetic materials with robust and controllable perpendicular magnetic anisotropy(PMA)are highly desirable for developing flexible high-performance spintronic devices.However,it is still challenge to fabricate PMA films on polymers directly.Here,we report a facile method for synthesizing single-crystal freestanding SrRuO_(3) membranes with controlled crystal structure and orientation using water-soluble Ca_(3-x)Sr_(x)Al_(2)O_(3)6 sacrificial layers.Through cooperative effect of crystal structure and orientation,flexible membranes reveal highly tunable magnetic anisotropy from in-plane to out-of-plane with a remarkable PMA energy of 7×10^(6) erg·cm^(−3).First-principle calculations reveal that the underlying mechanism of PMA modulation is intimately correlated with structure-controlled Ru 4d-orbital occupation,as well as spin-orbital matrix element differences,dependent on the crystal orientation.In addition,even after 10,000 bending cycles,the PMA keeps stable,indicating a robust magnetism reliability in the prepared films.This work provides a feasible approach to prepare the flexible oxide films with strong and controllable PMA.展开更多
基金supported by the National Key Research and Development Program of China (Nos.2017YFA0303600,2019YFA0307800)the National Natural Science Foundation of China (Nos.12174406,U1832102,11874367,51931011,51902322)+5 种基金the Key Research Program of Frontier Sciences,Chinese Academy of Sciences (No.ZDBS-LY-SLH008)the Thousand Young Talents Program of China,K.C.Wong Education Foundation (GJTD-2020-11)the 3315 Program of Ningbo,the Natural Science Foundation of Zhejiang province of China (No.LR20A040001)the Public Welfare Technical Applied Research Project of Zhejiang Province (No.LY21E020007)the Ningbo Natural Science Foundation (No.2019A610050)the Beijing National Laboratory for Condensed Matter Physics.
文摘Flexible magnetic materials with robust and controllable perpendicular magnetic anisotropy(PMA)are highly desirable for developing flexible high-performance spintronic devices.However,it is still challenge to fabricate PMA films on polymers directly.Here,we report a facile method for synthesizing single-crystal freestanding SrRuO_(3) membranes with controlled crystal structure and orientation using water-soluble Ca_(3-x)Sr_(x)Al_(2)O_(3)6 sacrificial layers.Through cooperative effect of crystal structure and orientation,flexible membranes reveal highly tunable magnetic anisotropy from in-plane to out-of-plane with a remarkable PMA energy of 7×10^(6) erg·cm^(−3).First-principle calculations reveal that the underlying mechanism of PMA modulation is intimately correlated with structure-controlled Ru 4d-orbital occupation,as well as spin-orbital matrix element differences,dependent on the crystal orientation.In addition,even after 10,000 bending cycles,the PMA keeps stable,indicating a robust magnetism reliability in the prepared films.This work provides a feasible approach to prepare the flexible oxide films with strong and controllable PMA.
