Double-perovskite Sr_2FeMoO_6 epitaxial films with ordered cation structure grown in mixture gas of hydrogen and argon

摘要

Epitaxial double-perovskite Sr_2FeMoO_6 films have been grown by pulsed laser deposition (PLD) on SrTiO_3 substrates. High-quality metallic Sr_2FeMoO_6 thin films with low resistivity were obtained by deposited in a mixture gas of hydrogen and argon. Resistivity versus temperature measurements, magnetic measurement, and x-ray diffraction indicate that using a mixture forming gas of hydrogen and argon in PLD is a flexible method for preparing high-quality epitaxial Sr_2FeMoO_6 films. In (011) cross-section high-resolution transmission electron microscopy images of epitaxial Sr_2FeMoO_6 films, the clear superlattice structure of ordered cations of Fe and Mo is shown.