TY - JOUR
T1 - Size dependence of oxygen-annealing effects on superconductivity of Fe1+yTe1-xSx
AU - Yamazaki, Teruo
AU - Sakurai, Tatsuya
AU - Yaguchi, Hiroshi
PY - 2016/11/15
Y1 - 2016/11/15
N2 - 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.
AB - 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.
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U2 - 10.7566/JPSJ.85.114712
DO - 10.7566/JPSJ.85.114712
M3 - Article
AN - SCOPUS:84994742988
SN - 0031-9015
VL - 85
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
IS - 11
M1 - 114712
ER -