| Autor: |
Fadis F. Murzakhanov, Anna A. Forysenkova, Inna V. Fadeeva, Georgy V. Mamin, Marat R. Gafurov |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Ceramics, Vol 5, Iss 3, Pp 318-329 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2571-6131 |
| DOI: |
10.3390/ceramics5030025 |
| Popis: |
Powders of β-tricalcium phosphate (β-TCP, Ca3PO4) doped with manganese (Mn2+) are comprehensively analyzed with electron paramagnetic resonance (EPR) and electron-nuclear double resonance (ENDOR) techniques. The modeling of the spectra permitted to calculate the values of zero-field splitting (B20 = −904 MHz; B40 = −1.41 MHz and B43 = 195.2 MHz) and explain the origin of the low-field hyperfine structures as the allowed spin transitions of fine structure. Three structurally inequivalent positions for Mn2+ in the β-TCP crystal lattice are identified and their g-factors and hyperfine constants are quantified. The obtained results can serve as fundamental background to the study of structurally disordered matrices with high spin (S ≥ 1) impurities which are important for catalytic systems. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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