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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2021, Volume 113, Issue 7, Pages 450–456
DOI: https://doi.org/10.31857/S1234567821070053 (Mi jetpl6397) 		 
This article is cited in 5 scientific papers (total in 5 papers)

CONDENSED MATTER

Impact of impurity phases and superstoichiometric iron on the critical temperature of iron chalcogenides

I. I. Gimazova, A. G. Kiiamovb, N. M. Lyadova, A. N. Vasilievcd, D. A. Chareevbe, Yu. I. Talanova

a Zavoisky Physical-Technical Institute, Russian Academy of Sciences, Kazan, 420029 Russia
b Kazan Federal University, Kazan, 420008 Russia
c Moscow State University, Moscow, 119991 Russia
d Ural Federal University, Yekaterinburg, 620002 Russia
e Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow region,142432 Russia
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DOI: https://doi.org/10.31857/S1234567821070053
Abstract: The results of transport and magnetic measurements of iron chalcogenide crystals are analyzed taking into account the data of the chemical composition and impurity phases obtained by means of X-ray diffractometry. It has been found that ions of excess (superstoichiometric) iron, as well as impurity phases, produce stresses in the crystal lattice, and this leads to an increase in the superconducting transition temperature. The amount of impurity inclusions increases with time owing to spinodal decomposition, and they also promote the critical temperature rise.
Funding agency Grant number
Russian Foundation for Basic Research 20-32-90063
20-02-00561
17-29-10007
Ministry of Education and Science of the Russian Federation 02.A03.21.0006
Ministry of Science and Higher Education of the Russian Federation 0671-2020-0050
I.I.G. acknowledges the support of the Russian Foundation for Basic Research (project no. 20-32-90063). D.A.Ch. and A.N.V. acknowledge the support of the Russian Foundation for Basic Research (project nos. 20-02-00561 and 17-29-10007), the Government of Russian Federation (agreement no. 02.A03.21.0006, program no. 211), and Kazan Federal University. The X-ray diffraction studies performed by A.G.K. were supported by the Ministry of Science and Higher Education of the Russian Federation (project no. 0671-2020-0050, state assignment for Kazan Federal University).
Received: 22.12.2020
Revised: 02.03.2020
Accepted: 02.03.2020
English version:
Journal of Experimental and Theoretical Physics Letters, 2021, Volume 113, Issue 7, Pages 454–460
DOI: https://doi.org/10.1134/S0021364021070067
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: I. I. Gimazov, A. G. Kiiamov, N. M. Lyadov, A. N. Vasiliev, D. A. Chareev, Yu. I. Talanov, “Impact of impurity phases and superstoichiometric iron on the critical temperature of iron chalcogenides”, Pis'ma v Zh. Èksper. Teoret. Fiz., 113:7 (2021), 450–456; JETP Letters, 113:7 (2021), 454–460
Citation in format AMSBIB
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    • This publication is cited in the following 5 articles:
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