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Superconductivity of FeSe0.5Te0.5 Thin Films Grown by Pulsed Laser Deposition

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arxiv 0910.2301 v1 pith:6KZWGS5N submitted 2009-10-13 cond-mat.supr-con

Superconductivity of FeSe0.5Te0.5 Thin Films Grown by Pulsed Laser Deposition

Yoshinori Imai , Ryo Tanaka , Takanori Akiike , Masafumi Hanawa , Ichiro Tsukada , Atsutaka Maeda This is my paper
classification cond-mat.supr-con
keywords fese0filmfilmssubstratesuperconductivitythindepositeddeposition
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FeSe0.5Te0.5 thin films with PbO-type structure are successfully grown on MgO(100) and LaSrAlO4(001) substrates from FeSe0.5Te0.5 or FeSe0.5Te0.75 polycrystalline targets by pulsed-laser deposition. The film deposited on the MgO substrate (film thickness ~ 55 nm) shows superconductivity at 10.6 K (onset) and 9.2 K (zero resistivity). On the other hand, the film deposited on the LaSrAlO4 substrate (film thickness ~ 250 nm) exhibits superconductivity at 5.4 K (onset) and 2.7 K (zero resistivity). This suggests the strong influence of substrate materials and/or the c-axis length to superconducting properties of FeSe0.5Te0.5 thin films.

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