Thanh, NK;
Loan, TT;
Anh, LN;
Duong, NP;
Soontaranon, S;
Thammajak, N;
Hien, TD;
(2016)
Cation distribution in CuFe₂O₄ nanoparticles: Effects of Ni doping on magnetic properties.
Journal of Applied Physics
, 120
(14)
, Article 142115. 10.1063/1.4961722.
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Abstract
he Cu₁_ₓNiₓFe₂O₄ nanoparticles (with x = 0, 0.3, 0.5, 0.7, and 1) were synthesized by using spray co-precipitation method at annealing temperature Tₐ = 900 °C in air for 5 h. The crystal structure, microstructure, oxidation state, and magnetic properties of the samples were characterized by using X-ray diffraction, synchrotron X-ray diffraction, scanning electron microscopy, X-ray absorption spectroscopy, and vibrating sample magnetometer. It was shown that all the samples have cubic structure. Lattice constant and grain size decrease, while the Curie temperature TC increases with increasing of Ni²⁺ content. A small amount of Fe²⁺ was found in all the samples. Cation distribution was determined by using a combination of magnetization measurements, extended X-ray absorption fine structure analysis, and Rietveld refinement from synchrotron X-ray diffraction data. It was indicated that Ni²⁺ ions occupy in octahedral site only, while Cu²⁺ ions distribute in both tetrahedral and octahedral sites. The variation of magnetic parameters is discussed based on Ni²⁺ concentration, grain size, the cation distribution, surface effect, and the presence of Fe²⁺ ion in the samples.
| Type: | Article |
|---|---|
| Title: | Cation distribution in CuFe₂O₄ nanoparticles: Effects of Ni doping on magnetic properties |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.4961722 |
| Publisher version: | https://doi.org/10.1063/1.4961722 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10069625 |
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