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- Title
Optical Phonons in TlFeS<sub>2</sub> and TlFeSe<sub>2</sub> Semiconductor Compounds.
- Authors
Veliyev, R. Q.; Abdullayev, N. A.; Amiraslanov, I. R.; Mamedova, I. A.; Mamedov, D. A.; Badalova, Z. I.; Gudavasov, Sh. K.; Nemov, S. A.
- Abstract
X-ray studies of TlFeS2 and TlFeSe2 crystals grown by high-temperature synthesis reveal their single-phase nature and isostructurality with the space group C2/m. Raman scattering and infrared reflection of light in TlFeS2 and TlFeSe2 compounds is studied at a temperature of 300 K. Characteristic frequencies in the Raman scattering and infrared spectra of phonons in TlFeS2 and TlFeSe2 are detected. An analysis of published works on the magnetic properties of TlFeS2 and TlFeSe2 allows the conclusion that they are quasi-one-dimensional antiferromagnets each having two characteristic temperatures TN3D and , between which quasi-one-dimensional antiferromagnetic ordering in TlFeS2 and TlFeSe2 is favorable. The temperature is introduced for the first time and characterizes a highly developed short-range magnetic order, in which superparamagnetic ordering exists.
- Subjects
COMPOUND semiconductors; PHONONS; OPTICAL reflection; SPACE groups; INFRARED spectra; RAMAN scattering; SUPERPARAMAGNETIC materials
- Publication
Semiconductors, 2022, Vol 56, Issue 1, p32
- ISSN
1063-7826
- Publication type
Article
- DOI
10.1134/S1063782621080194