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

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91 Citations (Scopus)

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.

Original languageEnglish
Article number043102
JournalApplied Physics Express
Volume3
Issue number4
DOIs
Publication statusPublished - 2010 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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