Crystal structure, magnetic properties, and raman spectra of solid solutions BaFe12–x Al x O19

Труханов, А.В.; Dang, N. T.; Jabarov, S. H.; Kazakevich, I. S.; Mammadov, A. I.; Mekhdiyeva, R. Z.; Турченко, В. А.; Huseynov, R. E.

doi:10.1134/s1063783416050267

Cited by 25 publications

(4 citation statements)

References 16 publications

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“…Therefore, the magnetic properties of materials manifest themselves predominantly at low temperatures. These processes can be experimentally studied by using Raman and infrared spectroscopy [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

INVESTIGATION OF THE ATOMIC DYNAMICS OF CdSe THIN LAYERS BY RAMAN SPECTROSCOPY

Abdullayev,

Ibrahimova,

Aliyev

et al. 2024

Chemical Problems

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This study is focused on investigating the atomic dynamics and vibrational properties of thin layers of cadmium selenide with thickness ranging from 200–500 nm. The studies were carried out using Raman spectroscopy at room temperature. Raman spectra were obtained in the frequency range ν = 100-800 cm -1 . Two vibration modes were observed within the specified frequency range. It has been established that these vibration modes correspond to vibrations of Cd–Se covalent bonds. The frequency of these vibrational modes was observed to increase as the thickness of CdSe thin films increased, which was attributed to the formation of a thickness-dependent phase.

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Section: Introductionmentioning

confidence: 99%

INVESTIGATION OF THE ATOMIC DYNAMICS OF CdSe THIN LAYERS BY RAMAN SPECTROSCOPY

Abdullayev,

Ibrahimova,

Aliyev

et al. 2024

Chemical Problems

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“…Recently, size effects in functional materials have been widely studied. It has been established that the properties of materials change depending on the size of crystallites and particles [11][12][13][14][15]. The main studies carried out in this direction relate to nanomaterials [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Influence of a neutron beam on the electrical properties of nanosized Y2O3 crystals

Dashdemirov,

Rzayev,

Aliyev

2023

UNEC j. eng. appl. sci.

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In the presented work, high purity yttrium oxide (99.99%), nanosized crystal density 0.069 g/cm3, specific surface area 100-150 m2/g, average crystal size 8-10 nm and difrent intensities (4.0×10 12 n/cm2, 1.3×10 13 n/cm² and 4.0×10 14 n/cm²) in the temperature range of 300-700 K, the electrical properties were investigated after irradiation with fast neutrons. It has been established that the electrical properties of Y 2 O 3 nanocrystals in a wide temperature range show an increase in the electrical conductivity according to a linear law after irradiation of various intensities. The increase in conductivity depending on the intensity of fast neutron radiation is due to the predominance of yttrium vacancies in the conductivity.

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“…As it was previously reported by the results of a study of the crystal structure by X‐ray and neutron powder diffraction methods, the solid solutions of barium hexaferrite substituted by diamagnetic cations such as Al 3+ , In 3+ , Sc 3+ , and Ga 3+ retain the hexagonal symmetry of the unit cell described by the centrosymmetric P6 3 /mmc (No 194) space group. [ 24–28 ] It was also reported that the crystal structure of such substituted barium hexaferrites can be satisfactorily described by the hexagonal non‐centrosymmetric P6 3 mc (No 186) space group. [ 29–31 ] The ionic coordinates have been clarified and the bond lengths and bond angles have been calculated.…”

Section: Introductionmentioning

confidence: 99%

Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe_11.9In_0.1O₁₉ Ferrite

Agayev

Труханов

Trukhanov

et al. 2022

Physica Status Solidi (b)

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Herein, the crystal structure, surface morphology, and magnetic and thermal properties of the BaFe11.9In0.1O19‐substituted M‐type hexaferrite are investigated. This solid solution is fabricated using “two‐step” topotactic reactions. It is determined through the X‐ray diffraction method that the crystal structure of this solid solution under normal conditions has hexagonal symmetry with P63/mmc space group (No. 194) with the unit cell parameters a = 5.8992(1) Å and c = 23.2275(7) Å. It is determined by the scanning electron microscope (SEM) researches that the average size of the grains is true d ¯ = 6 μm. It is determined by the vibration magnetometry that the ferrimagnet–paramagnet phase transition happens at around T C = 420 °C. Using differential scanning calorimetry (DSC), it is found that air and water molecules leave the sample surface up to 420 °C and the resulting oxygen anions appearing as a result of a solvothermal reaction fill the oxygen vacancies in the crystal structure at high temperatures up to 800 °C. The thermal transitions repeated in the high temperatures are established. The oxidation behavior of this compound is determined from thermogravimetric analysis (TGA) in a wide temperature range.

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Crystal structure, magnetic properties, and raman spectra of solid solutions BaFe12–x Al x O19

Cited by 25 publications

References 16 publications

INVESTIGATION OF THE ATOMIC DYNAMICS OF CdSe THIN LAYERS BY RAMAN SPECTROSCOPY

INVESTIGATION OF THE ATOMIC DYNAMICS OF CdSe THIN LAYERS BY RAMAN SPECTROSCOPY

Influence of a neutron beam on the electrical properties of nanosized Y2O3 crystals

Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe_11.9In_0.1O₁₉ Ferrite

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Crystal structure, magnetic properties, and raman spectra of solid solutions BaFe12–x Al x O19

Cited by 25 publications

References 16 publications

INVESTIGATION OF THE ATOMIC DYNAMICS OF CdSe THIN LAYERS BY RAMAN SPECTROSCOPY

INVESTIGATION OF THE ATOMIC DYNAMICS OF CdSe THIN LAYERS BY RAMAN SPECTROSCOPY

Influence of a neutron beam on the electrical properties of nanosized Y2O3 crystals

Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe11.9In0.1O19 Ferrite

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Crystal Structure, Magnetic Properties and Thermal Behavior of BaFe_11.9In_0.1O₁₉ Ferrite