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Effect of O‐ and Mn‐Doping on Superconductivity in FeTe 0.5 Se 0.5 Superconductor
Author(s) -
Thakur Gohil S.,
Haque Zeba,
Neha Prakriti,
Gupta Laxmi C.,
Patnaik Satyabrata,
Ganguli Ashok K.
Publication year - 2014
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201300657
Subject(s) - superconductivity , manganese , doping , electrical resistivity and conductivity , materials science , magnetization , condensed matter physics , oxygen , selenium , volume fraction , ion , analytical chemistry (journal) , substitution effect , substitution (logic) , crystallography , chemistry , metallurgy , physics , magnetic field , quantum mechanics , composite material , neoclassical economics , chromatography , economics , computer science , programming language , organic chemistry
The effect of oxygen substitution at the selenium site and manganese substitution at the iron site in FeTe 0.5 Se 0.5 superconductor was investigated. It was found that upon partial O substitution, T c marginally decreases as seen in both resistivity and magnetization experiments. T c decreases even by a small amount of oxygen concentration (as low as 1 %). This observation is in contrast against an earlier work on Fe(Te/Se) samples,1 wherein T c as well as superconducting volume fraction were reported to increase in the samples annealed in air . Mn‐doping leads to a decrease in T c in FeTe 0.5 Se 0.5 , which one would expect considering pair‐breaking due to Mn 2+ ‐ions.