Characterization of the phase composition, crystal structure and superconducting properties of Fe1.02SeyTe1-y-xSx / Abouhaswa A. S.,Merentsov A. I.,Baranov N. V. // PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS. - 2016. - V. 527, l. . - P. 21-27.

ISSN/EISSN:

0921-4534 / 1873-2143

Type:

Article

Abstract:

Two series of the Fe1.02Se0.5Te0.5-xSx (I) and Fe1.02Se0.4Te0.6-xSx (II) samples with the sulfur for tellurium substitution and with the invariable Se concentrations have been synthesized and studied by means of X-ray diffraction, scanning electron microscopy, electrical resistivity and magnetic susceptibility measurements. The superconducting PbO-type phase is found to persists in the first series up to x = 0.4 and in the second one up to x = 0.5. Despite the lower ionic radius of sulfur in comparison with tellurium the replacement of tellurium by sulfur does not lead to contraction of the unit cell volume of the superconducting phase in both I and II series with ternary mixture of chalcogens. Variations of the lattice parameters caused by the S for Te substitution in the Fe1.02Se0.5Te0.5-xSx and Fe1.02Se0.4Te0.6-xSx samples are found to be less pronounced than that reported for the Fe1.02Te0.5Se0.5-xSx system and are accompanied by lowering of the critical temperature. The behavior of the lattice parameters and critical temperature of Fe(S,Se,Te) materials with the ternary mixture of chalcogens at substitutions is ascribed to the changes in the volume fraction and chemical compositions of the coexisting tetragonal and hexagonal phases. (C) 2016 Elsevier B.V. All rights reserved.

Author keywords:

FeSe-based superconductors; Solid state reactions; Phase composition; Crystal structure; Electrical resistivity; Magnetization

DOI:

10.1016/j.physc.2016.05.017

Web of Science ID:

ISI:000380753600004

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
Research-Areas	Physics
Web-of-Science-Categories	Physics, Applied
Author-Email	aliabohaswa@hotmail.com
ResearcherID-Numbers	Baranov, Nikolai/J-5042-2013 Merentsov, Alexander/R-6275-2016
ORCID-Numbers	Baranov, Nikolai/0000-0002-9720-5314 Merentsov, Alexander/0000-0002-0005-2594
Funding-Acknowledgement	RFBR {[}16-02-00480]; Ministry of Education and Science of Russia {[}1362]; Ural Branch of RAS {[}15-17-2-22]
Funding-Text	The present work was supported by RFBR (project No 16-02-00480) the Ministry of Education and Science of Russia (project No 1362) and by the Ural Branch of RAS (Project No 15-17-2-22). Authors are grateful for Dr. N.V. Selezneva for the assistance in the X-Ray examination of synthesized samples.
Number-of-Cited-References	29
Usage-Count-Last-180-days	8
Usage-Count-Since-2013	20
Journal-ISO	Physica C
Doc-Delivery-Number	DS4LW