Phase relations and structure-properties correlations in Fe(S,Se,Te) / Abouhaswa A. S.,Selezneva N. V.,Merentsov A. I.,Neznakhin D. S.,Baranov N. V. // PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS. - 2017. - V. 539, l. . - P. 19-24.

ISSN/EISSN:

0921-4534 / 1873-2143

Type:

Article

Abstract:

Three series of polycrystalline samples with nominal compositions Fe1.02TeySe1-y-xSx (y=0.3, 0.4, 0.6 and 0 <= x <= 0.7) have been synthesized and studied by means of the X-ray diffraction, scanning electron microscopy, electrical resistivity and magnetization measurements. Together with the tetragonal superconducting phase, all the samples have been found to contain a hexagonal phase of the NiAs-type; and the increase in sulfur content leads to a redistribution of various chalcogens between phases due to the difference in solubility limits and variations of the chemical compositions and volume fractions of these phases. The sulfur for selenium substitution in Fe1.02TeySe1-y-xSx results in a growth in the average interlayer distance in the superconducting tetragonal phase because of its enrichment by tellurium and depletion in sulfur; while the hexagonal phase becomes enriched by sulfur and depleted in tellurium with increasing sulfur content in the samples. It has been shown that in the Fe(Te,Se,S) materials with ternary mixture of chalcogens. the variation of the critical superconducting temperature correlates with the change in the average interlayer distance in the tetragonal structure as in other FeSe-based materials. (C) 2017 Elsevier B.V. All rights reserved.

Author keywords:

Iron based superconductors; Phase relations; Ternary mixture; Chemical composition; Interlayer distance SUPERCONDUCTING PROPERTIES; SYSTEM; SE

DOI:

10.1016/j.physc.2017.06.004

Web of Science ID:

ISI:000407402900004

Соавторы в МНС:

Другие поля

Поле	Значение
Month	AUG 15
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-2143
Keywords-Plus	SUPERCONDUCTING PROPERTIES; SYSTEM; SE
Research-Areas	Physics
Web-of-Science-Categories	Physics, Applied
Author-Email	aliabohaswa@hotmail.com
ResearcherID-Numbers	Baranov, Nikolai/J-5042-2013
ORCID-Numbers	Baranov, Nikolai/0000-0002-9720-5314
Funding-Acknowledgement	RFBR {[}16-02-00480]; Ministry of Education and Science of Russia {[}3.2916.2017/4.6]; FASO of Russia {[}01201463328]
Funding-Text	The present work was supported by RFBR (project No. 16-02-00480), by the Ministry of Education and Science of Russia (project No. 3.2916.2017/4.6) and by FASO of Russia (theme No. 01201463328).http://dx.doi.org/10.13039/501100002261.
Number-of-Cited-References	30
Usage-Count-Last-180-days	10
Usage-Count-Since-2013	10
Journal-ISO	Physica C
Doc-Delivery-Number	FD2ZI