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

Source: Jpn. J. Appl. Phys. 49, 023101 (2010); doi:10.1143/JJAP.49.023101

Issue Date: 1 March 2010

PUBLICATION DATA
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Yoshinori Imai
Department of Basic Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
Transformative Research-Project on Iron Pnictides (TRIP), Japan Science and Technology Agency, 5 Sanbancho, Chiyoda, Tokyo 102-0075, Japan

Ryo Tanaka
Department of Basic Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
Transformative Research-Project on Iron Pnictides (TRIP), Japan Science and Technology Agency, 5 Sanbancho, Chiyoda, Tokyo 102-0075, Japan

Takanori Akiike
Department of Basic Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
Transformative Research-Project on Iron Pnictides (TRIP), Japan Science and Technology Agency, 5 Sanbancho, Chiyoda, Tokyo 102-0075, Japan

Masafumi Hanawa
Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan
Transformative Research-Project on Iron Pnictides (TRIP), Japan Science and Technology Agency, 5 Sanbancho, Chiyoda, Tokyo 102-0075, Japan

Ichiro Tsukada
Central Research Institute of Electric Power Industry, 2-6-1 Nagasaka, Yokosuka, Kanagawa 240-0196, Japan
Transformative Research-Project on Iron Pnictides (TRIP), Japan Science and Technology Agency, 5 Sanbancho, Chiyoda, Tokyo 102-0075, Japan

Atsutaka Maeda
Department of Basic Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan
Transformative Research-Project on Iron Pnictides (TRIP), Japan Science and Technology Agency, 5 Sanbancho, Chiyoda, Tokyo 102-0075, Japan
FeSe0.5Te0.5 thin films with a 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: ${\sim}55$ 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: ${\sim}250$ 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 FeSe0.5Te0.5 thin films. ©2010

(As supplied by publisher.)

Permalink: http://dx.doi.org/10.1143/JJAP.49.023101
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