Crystal structure details of a two-phase Fe1+y(Te1-xSex) x=0.4 single crystal as a function of a heat treatment
This proposal is a continuation of the recently performed proposal 5-15-606 (4 days on D10). With this continuation experiment we suggest to study an inhomogeneous superconducting Fe1+y(Te1-xSex) x=0.4 single crystals that contains large inclusions of Fe3Se2.1Te1.8. Their size enabled us in nthe previous experiment to determine the crystal structure of both the matrix and the secondary phase. In the current experiment we suggest to study the influence of a heat-treatment (up to 800 K). We anticipate that at elevated temperatures the inhomogeneous sample becomes homogeneous again. The study should be able to resolve conflicting claims in the literature concerning the phase purity and question which phase hosts the superconductivity.
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PROKES Karel; HARTWIG Steffen; OULADDIAF Bachir; QURESHI Navid and WURMEHL Sabine. (2015). Crystal structure details of a two-phase Fe1+y(Te1-xSex) x=0.4 single crystal as a function of a heat treatment. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-11-414
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