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Superconductivity of FeSe_(1-x)Te_(x) Thin Films Grown by Pulsed Laser Deposition
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Superconductivity of FeSe_(1-x)Te_(x) Thin Films Grown by Pulsed Laser Deposition
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FeSe$_{1-x}$Te$_{x}$ thin films with PbO-type structure are successfully grown on MgO(100) and LaSrAlO$_{4}$(001) substrates from FeSe$_{1-x}$Te$_{x+d}$ polycrystalline targets by pulsed-laser deposition. The film deposited on the MgO substrate (film thickness $\sim$ 63 nm) shows superconductivity at 6.7 K (onset) and 5.5 K (zero resistivity). On the other hand, the film deposited on the LaSrAlO$_{4}$ substrate (film thickness $\sim$ 52 nm) exhibits only the onset of superconducting transition at 2.6 K, but does not show zero resistivity. This indicates the strong influence of epitaxial strain to superconducting properties of FeSe$_{1-x}$Te$_{x}$ thin films.
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