Magnetism and temperature dependence of nano-TiO2: Fe EPR spectra
Электронный архив УГЛТУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Magnetism and temperature dependence of nano-TiO2: Fe EPR spectra
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| Автор |
Molochnikov, L. S.
Borodin, K. I. Yermakov, A. E. Uimin, M. A. Minin, A. S. Vostroknutova, A. V. Eremina, R. M. Kurkin, M. I. Konev, S. F. Konev, A. S. Murzakayev, A. M. Gaviko, V. S. |
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| Тематика |
AFM-DIMERS
NANOPARTICLES TEMPERATURE DEPENDENT EPR TIO2 |
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| Описание |
Nanocrystalline TiO2 samples of various compositions (up to 5 at.% Fe) with anatase structure and an average particle size of about 20 nm were synthesized using sol-gel technology. The magnetic properties of nano-TiO2: Fe was studied by electron paramagnetic resonance (EPR) and Faraday balance. The existence of an inhomogeneous magnetic state in TiO2: Fe samples of different compositions were revealed by EPR spectroscopy in a wide temperature range. The analysis of the EPR spectra in the L -, X - and Q-bands allowed us to calculate the quadratic fine structure (D, E) parameters, “axial” and “rhombic” ones, respectively. The value of D turned out to be quite small, which indicates an insignificant anisotropy, which can be ignored describing the magnetic properties of TiO2:Fe. It was shown that the temperature behavior of different separate components of the integral EPR spectra can be qualitatively interpreted in the model of coexistence in the TiO2: Fe system, mainly, dimers with a strong negative exchange interaction and isolated paramagnetic centers. No ferromagnetic state in TiO2: Fe-based samples after etching of aE-prepared state were detected. © 2021
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| Дата |
2021-11-08T07:35:34Z
2021-11-08T07:35:34Z 2022 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) Published version (info:eu-repo/semantics/publishedVersion) |
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| Идентификатор |
Magnetism and temperature dependence of nano-TiO2: Fe EPR spectra / L. S. Molochnikov, K. I. Borodin, A. E. Yermakov [et al.] // Materials Chemistry and Physics. – 2022. – Vol. 276. – № 125327.
0254-0584 https://elar.usfeu.ru/handle/123456789/11246 |
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| Язык |
en
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| Издатель |
Elsevier Ltd
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| Источник |
Materials Chemistry and Physics
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