Homogeneity range of ternary 11-type chalcogenides Fe1 + yTe1−xSex

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Homogeneity Range of Ternary 11-Type Chalcogenides Fe1 + y Te1−x Se x.pdf (1.45 MB)

Date

2017

Authors

Koz, C.
Rößler, S.
Wirth, S.
Schwarz, U.

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Abstract

The 11-type Fe-chalcogenides belong to the family of Fe-based superconductors. In these compounds, the interstitial Fe is known to strongly influence the magnetic and superconducting properties. Here, we present the chemical homogeneity range of ternary compounds Fe1 + yTe1−xSex based on powder x-ray diffraction, energy dispersive x-ray analysis, and magnetization measurements. Our investigations show that the maximum amount of excess Fe in homogeneous Fe1 + yTe1−xSex decreases with increase in Se substitution for Te. Using our synthesis procedure, single-phase Fe1 + yTe1−xSex, with 0.5 ≤ x < 1 could not be formed for any amount of excess Fe. Further, the superconducting volume fraction in the material is found to be strongly suppressed by excess Fe.

Source Title

Journal of Superconductivity and Novel Magnetism

Publisher

Springer

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Keywords

Fe-based superconductors, Fe-chalcogenides, Ternary phase diagram, Chalcogenides, Chemical analysis, Chemical compounds, Energy dispersive x-ray analysis, Inorganic compounds, Superconducting materials, Ternary alloys, X ray analysis, X ray diffraction, Chemical homogeneity, Magnetization measurements, Powder x-ray diffraction, Superconducting properties, Superconducting volume, Synthesis procedure, Iron compounds

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http://hdl.handle.net/11693/37466

Published Version (Please cite this version)

http://dx.doi.org/10.1007/s10948-016-3632-x

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Scholarly Publications - UNAM

Language

English

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Article