Abstract
Fe(Se 1− x Te x ) thin films on (1 0 0) SrTiO 3 were fabricated by a pulsed laser deposition method, and their crystal orientation, compositional shifts and superconducting properties were characterized by X-ray diffraction, scanning electron microscope combined with energy dispersive X-ray spectroscopy, etc. Compositional shift is one of the major problems during the fabrication of Fe(Se 1− x Te x ) films due to its containing high volatile elements such as Se and Te. The compositional shifts were found dependent on the Ar background gas pressure ( P Ar), which was suppressed by the increase of P Ar. In addition, it was revealed that the temperature window for the crystallization of the films was shifted to higher temperature region and wider temperature range with the increase of P Ar.
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