Substitution Effects on FeSe Superconductor

Details Substitution Effects on FeSe Superconductor Substitution Effects on FeSe Superconductor

2008-11-07

arxiv.org/abs/0811.1123v3

J. Phys. Soc. Jpn. 78, 074712 (2009)

Physics

Condensed Matter

Superconductivity

17 pages, 15 figures, 1 table

Scientific paper

10.1143/JPSJ.78.074712

We have investigated the effect of atomic substitutions in the FeSe system, which exhibits the simplest crystal structure among the iron-based superconductors. An enhancement of the superconducting transition temperature Tc was observed with the substitution of S or Te for Se; the Tc increased with S substitution by up to 20 %, and also increased with Te substitution up to 75 %. In contrast, Co or Ni substitutions for the Fe site significantly suppressed superconductivity. In this work we present a detailed description of the substitution technique employed to determine Tc in the FeSe system.

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