Communications

¹¹⁹Sn Mössbauer spectroscopy of nickel zinc orthostannates prepared by self-propagating high-temperature synthesis

M. V. Kuznetsov^a, D. A. Pankratov^bc, Yu. G. Morozov^d, A. V. Safonov^a, O. V. Belousova<sup>d

a</sup> All-Russian Research Institute on Problems of Civil Defence and Emergencies, 121352 Moscow, Russian Federation
^b Department of Chemistry, M. V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
^c Moscow Institute of Physics and Technology (National Research University), 141700 Dolgoprudny, Moscow Region, Russian Federation
^d A. G. Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, 142432 Chernogolovka, Moscow Region, Russian Federation

Аннотация: Zinc orthostannate (Zn₂SnO₄) and nickel zinc orthostannate (Zn_1.2Ni_0.8SnO₄) were prepared by self-propagating hightemperature synthesis (SHS) and characterized by ¹¹⁹Sn Mössbauer spectroscopy. Both orthostannates are cubic spinels exhibiting defect-induced ferromagnetic behavior due to their microstructures. The Mössbauer spectrum of Zn₂SnO₄ appears as single unresolved doublet [δ = 0.169(3) mm s^–1, Δ = 0.45(1) mm s^–1], and in the case of Zn_1.2Ni_0.8SnO₄, partial substitution of zinc by nickel is the cause of the appearance of a second doublet of Sn⁴⁺ [δ = 0.44(9) mm s–1, Δ = 1.62(1) mm s^–1] due to an increase in the occupancy of the 5s orbital of the corresponding tin atoms and the localization of crystallographic defects near them.

Ключевые слова: self-propagating high-temperature synthesis, SHS, nickel zinc orthostannates, microstructure, X-ray diffraction, Mössbauer spectra, XPS, magnetic measurements.

Поступила в редакцию: 18.04.2025
Принята в печать: 11.06.2025

Язык публикации: английский

DOI: 10.71267/mencom.7804

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