Growth of epitaxial thin films of the ordered double perovskite La_2NiMnO_6 on different substrates

摘要

Epitaxial thin films of La_2NiMnO_6, a ferromagnetic semiconductor, have been fabricated on different substrates by pulsed laser deposition. The x-ray diffraction and Raman scattering observations reveal that the films are single crystalline and have an orthorhombic structure. The magnetic properties of the films, including the coercive field, remanent magnetization, and Curie temperature, are strongly dependent on the choice of the substrate. The optimized films exhibit a magnetic moment of 4.63 μ_B/f.u. at 5 K, with a Curie temperature close to 280 K. The film characteristics are promising for potential device applications in information storage, spintronics, and sensors.