Effect of iron doping on the properties of nanopowders and coatings on the basis of Al2O3 produced by pulsed electron beam evaporation

Sokovnin, S. Yu.; Il’ves, Vladislav G.; Surdo, A. I.; Milman, I. I.; Vlasov, Maxim I.

doi:10.1134/s1995078013040186

Cited by 13 publications

(1 citation statement)

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“…In many works there is an indication of a lack of logical correlation between magnetization of DSM and concentration of a magnetic dopant [11][12][13]. Often, the ferromagnetic response of undoped materials (so-called d 0ferromagnetism) surpasses the corresponding response in doped materials by magnetic 3D elements semiconductors and oxides [14][15][16][17][18][19]. There are not yet enough studies in which the investigated materials with concentrations of magnetic dopants below a percolation threshold have been observed.…”

Section: Introductionmentioning

confidence: 99%

Influence of Fe-Doping on the Structural and Magnetic Properties of ZnO Nanopowders, Produced by the Method of Pulsed Electron Beam Evaporation

Il’ves

Sokovnin

Мурзакаев

2016

Journal of Nanotechnology

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The nanopowders (NPs) ZnO-Zn-Fe and ZnO-Fe with the various concentrations of Fe (xFe) (0≤xFe≤0.619mass.%) were prepared by the pulsed electron beam evaporation method. The influence of doping Fe on structural and magnetic properties of NPs was investigated. X-ray diffraction showed that powders contain fine-crystalline and coarse-crystalline ZnO fractions with wurtzite structure and an amorphous component. Secondary phases were not found. The magnetic measurements made at room temperature, using the vibration magnetometer and Faraday’s scales, showed ferromagnetic behavior for all powders. Magnetization growth of NPs ZnO-Zn and ZnO-Zn-Fe was detected after their short-term annealing on air at temperatures of 300–500°C. The growth of magnetization is connected with the increase in the concentration of the phase ZnO with a defective structure as the result of oxidation nanoparticles (NPles) of Zn. The scanning transmission electron microscopy (STEM) showed a lack of Fe clusters and uniform distribution of atoms dopant in the initial powder ZnO-Zn-Fe. A lack of logical correlation between magnetization and concentration of a magnetic dopant of Fe in powders is shown.

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