| Autor: |
Hoang Bao Khanh, Valentina O. Mittova, Anh Tien Nguyen, Pham Thi Hong Duyen |
| Jazyk: |
English<br />Russian |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Конденсированные среды и межфазные границы, Vol 24, Iss 1 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
1606-867X |
| DOI: |
10.17308/kcmf.2022.24/9061 |
| Popis: |
Nanocrystalline copper (II) ferrite with a spinel structure doped with holmium was synthesized by co-precipitation using an aqueous solution of NaOH as a precipitant and subsequent annealing at 800°C for 60 min. The doping limit was determined by X-ray phase analysis. The similarity of the real and nominal compositions of the doped samples was established by energy-dispersive X-ray spectroscopy using a scanning electron microscope. The obtained particles had an approximately spherical shape, and their size was 40–70 nm (X-ray phase analysis, transmission electron microscopy). The introduction of Ho3+ cations to х = 0.15 into a CuFe2O4 spinel lattice led to a decrease in the average size of crystallites, an increase in the coercive force of nanopowders, and a decrease in excess magnetization and saturation magnetization. Synthesized CuFe2-xHoxO4 (х = 0, 0.1 and 0.15) nanopowders were magnetically hard materials with high coercive force. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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