Epitaxial films of FeTe1-xSx fabricated by second harmonic Nd:YAG pulsed laser deposition

K. Yoshida, Y. Yoshida, Y. Ichino, Y. Takai, A. Ichinose, K. Matsumoto, T. Kiss, M. Mukaida

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Abstract

Fe(Te,S) has a tetragonal PbO type structure with Tconset of around 10 K, which is the simplest structure among iron-based superconductors. We deposited Fe(Te,S) thin films by PLD method using the second harmonic light of Nd:YAG pulsed laser (wavelength = 532 nm) in the range of a deposition rate from 14 pm/s to 56 pm/s on MgO, SrTiO3 and LaAlO3 substrates. We obtained the thin films showed the c-axis orientation normal to the film surface and in-plane alignment. The film deposited on LaAlO3 showed Tconset of 9.3 K. Tconset and Tczero increased to 11 K and 6.6 K respectively by the excess adding Te to the stoichiometric target. Tconset was higher than that of a Fe(Te,S) bulk. The lattice constant of the films was strongly related to Tconset. Tconset has local maximum value at 6.195 of c-axis length.

Original languageEnglish
Pages (from-to)1185-1188
Number of pages4
JournalPhysica C: Superconductivity and its applications
Volume471
Issue number21-22
DOIs
Publication statusPublished - Nov 1 2011

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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