Systematic Comparison of Eight Substrates in the Growth of FeSe0.5Te0.5 Superconducting Thin Films

被引：88
|
作者：
Imai, Yoshinori [1 ,5 ]
Akiike, Takanori [1 ,5 ]
Hanawa, Masafumi [2 ,5 ]
Tsukada, Ichiro [2 ,5 ]
Ichinose, Ataru [2 ,5 ]
Maeda, Atsutaka [1 ,5 ]
Hikage, Tatsuo [3 ]
Kawaguchi, Takahiko [4 ,5 ]
Ikuta, Hiroshi [4 ,5 ]
机构：
[1] Univ Tokyo, Dept Basic Sci, Meguro Ku, Tokyo 1538902, Japan
[2] Cent Res Inst Elect Power Ind, Kanagawa 2400196, Japan
[3] Nagoya Univ, High Intens Xray Diffract Lab, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[4] Nagoya Univ, Dept Crystalline Mat Sci, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[5] Japan Sci & Technol Agcy, Transformat Res Project Iron Pnictides, Chiyoda Ku, Tokyo 1020075, Japan
来源：
APPLIED PHYSICS EXPRESS | 2010年 / 3卷 / 04期
关键词：
FESE;
D O I：
10.1143/APEX.3.043102
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated the crystal structures and superconducting properties of thin films of FeSe0.5Te0.5 grown on eight different substrates. Superconductivity is not correlated with the lattice mismatch; rather it is correlated with the degree of in-plane orientation and with the lattice parameter ratio c/a. The best superconducting properties were observed in films on MgO and LaAlO3 (T-c(zero) of 9.4 K). Transmission electron microscopy observation showed that the presence or absence of an amorphous-like layer at the substrate surface plays a key role in determining the structural and superconducting properties of the grown films. (C) 2010 The Japan Society of Applied Physics
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页数：3
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