Magnetic Properties of an SrMnO 3 /La 0.7 Sr 0.3 MnO 3 Heterostructure on an NdGaO 3 Substrate

n epitaxial heterostructure based on strontium and lanthanum-strontium manganite films ( SrMnO_3 and La_0.7Sr_0.3MnO_3 ) is studied. Ferromagnetic resonance spectra, angular dependences of the resonance field for different temperatures, in-plane and cubic anisotropy as well as the temperature dependences of the magnetization, were measured. The obtained magnetic parameters of the heterostructure were compared with the magnetic parameters of a single La_0.7Sr_0.3MnO_3 film. We assume that the existence of an interlayer exchange at the ferromagnet-antiferromagnet interface at low temperatures leads to the appearance of unidirectional anisotropy in the heterostructure SrMnO_3 / La_0.7Sr_0.3MnO_3 . We believe that the presented results will be useful for the practical development of antiferromagnet-based ultrafast devices: emitters, amplifiers, detectors.