Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure.

ABSTRACT: Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk properties. Here, by utilizing tunneling anisotropic magnetoresistance in a single-barrier heterostructure composed of La_0.6Sr_0.4MnO₃ (LSMO)/LaAlO₃ (LAO)/Nb-doped SrTiO₃ (001), we reveal the presence of a peculiar strong two-fold magnetic anisotropy (MA) along the [110]_c direction at the LSMO/LAO interface, which is not observed in bulk LSMO. This MA shows unknown behavior that the easy magnetization axis rotates by 90° at an energy of 0.2 eV below the Fermi level in LSMO. We attribute thi

SUBMITTER: Anh LD 

PROVIDER: S-EPMC5562907 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature