Magnetic, Optical, and Thermic Properties of SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) Compounds
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Published:2023-07-29
Issue:8
Volume:9
Page:194
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ISSN:2312-7481
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Container-title:Magnetochemistry
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language:en
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Short-container-title:Magnetochemistry
Author:
Habibullayev Navruzbek N.1ORCID, Naumov Nikolay G.2, Lavrov Alexander N.2, Kuratieva Natalia V.2, Aleksandrovsky Aleksandr S.34ORCID, Oreshonkov Aleksandr S.34ORCID, Molokeev Maxim S.567ORCID, Palamarchuk Irina V.1ORCID, Yurev Ilya O.18ORCID, Denisenko Yuriy G.19ORCID, Andreev Oleg V.110, Zakharova Alena D.1
Affiliation:
1. Institute of Chemistry, University of Tyumen, 625003 Tyumen, Russia 2. Nikolaev Institute of Inorganic Chemistry SB RAS, 630090 Novosibirsk, Russia 3. Kirensky Institute of Physics, Federal Research Center, KSC, SB RAS, 660036 Krasnoyarsk, Russia 4. Department of Photonics and Laser Technology, Siberian Federal University, 660036 Krasnoyarsk, Russia 5. Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center, KSC, SB RAS, 660036 Krasnoyarsk, Russia 6. Laboratory of Theory and Optimization of Chemical and Technological Processes, University of Tyumen, 625003 Tyumen, Russia 7. Department of Physics, Far Eastern State Transport University, 680021 Khabarovsk, Russia 8. Department of Physical and Applied Chemistry, Kurgan State University, 640020 Kurgan, Russia 9. Department of General and Special Chemistry, Industrial University of Tyumen, 625000 Tyumen, Russia 10. Institute of Solid State Chemistry, UB RAS, 620990 Ekaterinburg, Russia
Abstract
SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) compounds crystallize in the Pnma and Cmcm orthorhombic space group and belong to the Eu2CuS3 and KCuZrS3 structural type, respectively. According to a single-crystal XRD study, the SrTmCuSe3 unit cell parameters are a = 4.0631 (4), b = 13.4544 (14), c = 10.4430 (10) Å, and V = 570.88 (10) Å3. All the studied SrLnCuSe3 samples in the temperature range of 1.77–300 K demonstrate paramagnetic behavior without any features pointing to magnetic ordering. The measured Curie constants coincide with the values expected for Ln3+ ions with good accuracy, which confirms the stoichiometric composition of the samples and the non-magnetic state of the copper ions, Cu1+ (S = 0). The conducted optical absorption study showed that the polycrystalline SrLnCuSe3 (Ln = Dy, Ho, Er, Tm) samples are semiconductors with a direct bandgap ranging from 2.14 eV to 2.31 eV. Two indirect bandgaps were revealed and explained by the presence of optical transitions to highly dispersive subbands in the conduction band. The compounds demonstrate two reversible phase transitions α⇆β, β⇆γ and an incongruent melting at 1606 K (Dy), 1584 K (Ho), 1634 K (Er), and 1620 K (Tm) associated with the formation of solid solutions of SrSe, Cu2-XSe, and Ln2Se3 binary compounds.
Funder
Russian Science Foundation
Subject
Materials Chemistry,Chemistry (miscellaneous),Electronic, Optical and Magnetic Materials
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