Тип публикации: статья из журнала

Год издания: 2023

Идентификатор DOI: 10.3390/magnetochemistry9080194

Ключевые слова: single-crystal X-ray diffraction, Curie-Weiss dependence, magnetic susceptibility, effective magnetic momentum, bandgap, DFT calculations, Raman spectrometry, thermal analysis, scanning electron microscope

Аннотация: <jats:p>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) Å3Показать полностью. 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.</jats:p>

Журнал: Magnetochemistry

Выпуск журнала: Т.9, №8

Номера страниц: 194

ISSN журнала: 23127481

• Habibullayev Navruzbek N. (Institute of Chemistry, University of Tyumen)
• Naumov Nikolay G. (Nikolaev Institute of Inorganic Chemistry SB RAS)
• Lavrov Alexander N. (Nikolaev Institute of Inorganic Chemistry SB RAS)
• Kuratieva Natalia V. (Nikolaev Institute of Inorganic Chemistry SB RAS)
• Aleksandrovsky Aleksandr S. (Department of Photonics and Laser Technology, Siberian Federal University)
• Oreshonkov Aleksandr S. (Department of Photonics and Laser Technology, Siberian Federal University)
• Molokeev Maxim S. (Department of Physics, Far Eastern State Transport University)
• Palamarchuk Irina V. (Institute of Chemistry, University of Tyumen)
• Yurev Ilya O. (Department of Physical and Applied Chemistry, Kurgan State University)
• Denisenko Yuriy G. (Department of General and Special Chemistry, Industrial University of Tyumen)
• Andreev Oleg V. (Institute of Solid State Chemistry)
• Zakharova Alena D. (Institute of Chemistry, University of Tyumen)

• Ядро РИНЦ (eLIBRARY.RU)