Size dependence of oxygen-annealing effects on superconductivity of Fe1+yTe1-xSx

Teruo Yamazaki, Tatsuya Sakurai, Hiroshi Yaguchi

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4 Citations (Scopus)

Abstract

For the Fe-based superconductor Fe1+yTe1-xSx, superconductivity is induced by annealing treatment in oxygen atmosphere, whereas as-grown samples do not show superconductivity. We investigated the sample-size dependence of O2-annealing effects in Fe1.01Te0.91S0.09. The annealing conditions were fixed to 1 atm, 200°C, and 2 h. We carried out magnetic susceptibility and specific heat measurements in order to evaluate the superconducting volume fraction. We found that Fe1+yTe1-xSx has an optimal size for the induction of bulk superconductivity by O2 annealing. Our results indicate that O2 annealing is probably effective near the surface of samples over a length of a few tens of micro meters.

Original languageEnglish
Article number114712
JournalJournal of the Physical Society of Japan
Volume85
Issue number11
DOIs
Publication statusPublished - 2016 Nov 15
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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