Freestanding La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>:NiO vertically aligned nanocomposite thin films for flexible perpendicular interfacial exchange coupling
Jijie Huang, Di Zhang, Juncheng Liu, Haiyan Wang
Abstract
High-quality epitaxial growth of nanocomposite thin-films typically requires a high-temperature process on single-crystal oxide substrates, which limits their potential for flexible device integration. Here, we adopted a water-soluble Sr3Al2O6 (SAO) sacrificial buffer layer to achieve a La0.7Sr0.3MnO3 (LSMO):NiO freestanding nanocomposite thin film. Freestanding LSMO:NiO film has been transferred onto a flexible polymer substrate, and exhibits an exchange bias effect, and no film quality degradation has been observed after an extensive bending process. This study opens a route to fabricate high-quality freestanding nanocomposite thin films and lays a foundation towards the applications of these multifunctional nanocomposite thin films in flexible spintronic and electronic devices.