Atomic-scale determination of spontaneous magnetic reversal in oxide heterostructures.

ABSTRACT: Interfaces between transition metal oxides are known to exhibit emerging electronic and magnetic properties. Here we report intriguing magnetic phenomena for La_2/3Sr_1/3MnO₃ films on an SrTiO₃ (001) substrate (LSMO/STO), where the interface governs the macroscopic properties of the entire monolithic thin film. The interface is characterized on the atomic level utilizing scanning transmission electron microscopy and electron energy loss spectroscopy (STEM-EELS), and density functional theory (DFT) is employed to elucidate the physics. STEM-EELS reveals mixed interfacial stoichiometry, subtle lattice distortions, and oxidation-state changes. Magnetic measurements combined with DFT calculations demonstrate that a unique form of antiferromagnetic exch

SUBMITTER: Saghayezhian M 

PROVIDER: S-EPMC6535000 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature