|
This article is cited in 4 scientific papers (total in 4 papers)
CONDENSED MATTER
Mössbauer spectroscopy study of FeSe$_{0.91}$S$_{0.09}$ superconductor single crystals
K. V. Frolova, I. S. Lyubutina, D. A. Chareevbcd, M. Abdel-Hafiezef a Shubnikov Institute of Crystallography, Federal Research Center Crystallography and Photonics,
Russian Academy of Sciences, Moscow, 119333 Russia
b Institute of Physics and Technology, Ural Federal University, Yekaterinburg, Russia
c Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432 Russia
d Institute of Geology and Petroleum Technologies, Kazan Federal University, Kazan, 420008 Russia
e National University of Science and Technology MISIS, Moscow, 119049 Russia
f Harvard University, Cambridge, MA 02138, USA
Abstract:
Mössbauer spectra of single crystals of sulfur-doped iron selenide FeSe$_{0.91}$S$_{0.09}$ are studied in a wide temperature range, including the vicinity of structural and superconducting transitions. It is found that iron atoms exhibit a nonmagnetic state even in the range of helium temperatures, which can be attributed to the low-spin state of Fe$^{2+}$ ($3d^6$, $S = 0$) ions. It is shown that this state remains nearly unchanged at temperatures close to the superconducting transition temperature. This means that the low-spin state of iron ions most probably results from some structural features and is not directly related to superconductivity. The temperature dependence of the parameters characterizing the hyperfine interaction exhibits several anomalies in the ranges of structural and electronic transitions. The Debye temperature $\Theta_{\mathrm{M}}=478$ K determined for the iron sublattice turns out to be much higher than the value $\Theta_{\mathrm{M}}=285$ K for the undoped FeSe$_{1-\delta}$ compound.
Received: 10.09.2019 Revised: 10.09.2019 Accepted: 20.09.2019
Citation:
K. V. Frolov, I. S. Lyubutin, D. A. Chareev, M. Abdel-Hafiez, “Mössbauer spectroscopy study of FeSe$_{0.91}$S$_{0.09}$ superconductor single crystals”, Pis'ma v Zh. Èksper. Teoret. Fiz., 110:8 (2019), 557–562; JETP Letters, 110:8 (2019), 562–567
Linking options:
https://www.mathnet.ru/eng/jetpl6028 https://www.mathnet.ru/eng/jetpl/v110/i8/p557
|
Statistics & downloads: |
Abstract page: | 146 | Full-text PDF : | 18 | References: | 16 | First page: | 1 |
|