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

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

2009-10-13

arxiv.org/abs/0910.2301v1

Jpn. J. Appl. Phys., 49 (2010) 023101

Physics

Condensed Matter

Superconductivity

24 pages, 5 figures

Scientific paper

10.1143/JJAP.49.023101

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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