Jpn. J. Appl. Phys. 49 (2010) 023101 (5 pages)  |Previous Article| |Next Article|  |Table of Contents|
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Superconductivity of FeSe_0.5Te_0.5 Thin Films Grown by Pulsed Laser Deposition

Yoshinori Imai^1,3, Ryo Tanaka^1,3, Takanori Akiike^1,3, Masafumi Hanawa^2,3, Ichiro Tsukada^2,3, and Atsutaka Maeda^1,3

(Received September 28, 2009; accepted November 6, 2009; published online February 22, 2010)

FeSe_0.5Te_0.5 thin films with a PbO-type structure are successfully grown on MgO(100) and LaSrAlO₄(001) substrates from FeSe_0.5Te_0.5 or FeSe_0.5Te_0.75 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 effect of substrate materials and/or the c-axis length on the superconducting properties of FeSe_0.5Te_0.5 thin films.

URL: http://jjap.jsap.jp/link?JJAP/49/023101/
DOI: 10.1143/JJAP.49.023101

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