Systematic comparison of eight substrates in the growth of FeSe 0.5Te0.5 superconducting thin films

Yoshinori Imai; Takanori Akiike; Masafumi Hanawa; Ichiro Tsukada; Ataru Ichinose; Atsutaka Maeda; Tatsuo Hikage; Takahiko Kawaguchi; Hiroshi Ikuta

doi:10.1143/APEX.3.043102

Systematic comparison of eight substrates in the growth of FeSe _0.5Te_0.5 superconducting thin films

Yoshinori Imai, Takanori Akiike, Masafumi Hanawa, Ichiro Tsukada, Ataru Ichinose, Atsutaka Maeda, Tatsuo Hikage, Takahiko Kawaguchi, Hiroshi Ikuta

SCI - Physics

Research output: Contribution to journal › Article › peer-review

94 Citations (Scopus)

Abstract

We have investigated the crystal structures and superconducting properties of thin films of FeSe_0.5Te_0.5 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^zero _c 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.

Original language	English
Article number	043102
Journal	Applied Physics Express
Volume	3
Issue number	4
DOIs	https://doi.org/10.1143/APEX.3.043102
Publication status	Published - 2010 Apr

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abstract = "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 (Tzero c 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.",

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AU - Imai, Yoshinori

AU - Akiike, Takanori

AU - Hanawa, Masafumi

AU - Tsukada, Ichiro

AU - Ichinose, Ataru

AU - Maeda, Atsutaka

AU - Hikage, Tatsuo

AU - Kawaguchi, Takahiko

AU - Ikuta, Hiroshi

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N2 - 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 (Tzero c 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.

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Systematic comparison of eight substrates in the growth of FeSe _0.5Te_0.5 superconducting thin films

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