Abstract
Nanopowders La1–x Zn x FeO3 (nominal degree of doping x nom = 0, 0.05, 0.075, 0.1, 0.15, 0.2, 0.3, and 0.4) were synthesized by the sol–gel method using aqueous ammonia as a precipitator and were then annealed at 950°C for 60 min. From the data of X-ray powder diffraction analysis and local electron probe microanalysis, the maximum actual limit of doping of lanthanum ferrite with zinc was determined: x = 0.072. The dependence of the particle size on the Zn2+ content was found to be nonmonotonic. The magnetic characteristics (specific magnetization J, coercivity H c, and magnetic susceptibility χ) of samples at temperatures of 300 and 100 K in fields of up to 1300 kA/m. It was shown that, with increasing degree of doping, J increases from 0.188 A m2/kg (at x = 0) to 0.245 A m2/kg (at x = 0.072), and χ varies nonmonotonically from 11.5 × 10–6 (at x = 0) to 15.3 × 10–6 (at x = 0.072) (at 300 K). With decreasing measurement temperature to 100 K, the magnetization and susceptibility monotonically increase.
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Original Russian Text © M.V. Knurova, I.Ya. Mittova, N.S. Perov, O.V. Al’myasheva, Nguyen Anh Tien, V.O. Mittova, V.V. Bessalova, E.L. Viryutina, 2017, published in Zhurnal Neorganicheskoi Khimii, 2017, Vol. 62, No. 3, pp. 275–282.
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Knurova, M.V., Mittova, I.Y., Perov, N.S. et al. Effect of the degree of doping on the size and magnetic properties of nanocrystals La1 – x Zn x FeO3 synthesized by the sol–gel method. Russ. J. Inorg. Chem. 62, 281–287 (2017). https://doi.org/10.1134/S0036023617030081
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DOI: https://doi.org/10.1134/S0036023617030081