Enhancement of superconductivity in the sintered FeSe0.5Te0.5 bulks with proper amount of Sn addition

Authors

Ning Chen, Tianjin University
Yongchang Liu, Tianjin University, Nankai University
Zongqing Ma, University of WollongongFollow
Huijun Li, University of WollongongFollow
Md Shahriar Hossain, University of WollongongFollow

RIS ID

98623

Publication Details

Chen, N., Liu, Y., Ma, Z., Li, H. & Hossain, M. Al. (2015). Enhancement of superconductivity in the sintered FeSe0.5Te0.5 bulks with proper amount of Sn addition. Journal of Alloys and Compounds, 633 233-236.

Abstract

Sn added bulk FeSe_0.5Te_0.5 samples are synthesized through two-step solid state reaction route. It is found that Sn addition can significantly enhance the transformation from the hexagonal phase to the superconducting tetragonal phase during the sintering process of FeSe_0.5Te_0.5 samples due to the appearance of liquid Sn at low temperature. With increase of superconducting phase proportion as well as improvement of its crystallinity, 5 wt% Sn addition dramatically enhances the zero resistivity temperature (Tc0) by 3 K accompanying with a bit improvement in the onset temperature of superconducting transition (Tcon). From this view, our work suggests a new prospective that how to search proper dopant to further improving superconductivity in 11 type Fe based superconductors.

Grant Number

ARC/DE140101333

Additional Grant Number

http://purl.org/au-research/grants/arc/DE140101333