Synthesis, structural and magnetic properties NaZnFe2(VO4)3
Drokina T. V.1, Molokeev M. S.1,2, Velikanov D. A.1, Bayukov O. A.1, Vorotynov A. M.1, Friedman A. L.1, Petrakovsky G. A.1
1Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
2Siberian State University, Krasnoyarsk, Russia

A new magnetic compound NaZnFe2(VO4)3 obtained by solid-phase synthesis has been studied using X-ray diffraction, Mossbauer spectroscopy, electron paramagnetic resonance, measurement of the temperature dependence of the dielectric permeability, and magnetometry. The crystalline structure of NaZnFe2(VO4)3 is described by a triclinic spatial group of symmetry P1 with the parameters of an elementary crystalline chain: a=6.74318 (7) Angstrem, b= 8.1729 (1) Angstrem, c=9.8421 (1) Angstrem, α= 106.2611 (9)o, β=104.55 (1)o, γ= 102.337 (1)o, V=479.88 (1) Angstrem3, Z=2. Magnetic Fe3+ cations in the cell occupy six positions populated together with diamagnetic Zn2+ cations, which leads to states of magnetic inhomogeneity and local violation of charge neutrality. Data from resonance and magnetic studies of NaZnFe2(VO4)3 confirm the main role of high-spin Fe3+ iron cations in the formation of magnetism with competing exchange magnetic interactions and a high value of the frustration index. It is shown that the magnetic subsystem of a sample with a negative asymptotic Neel temperature undergoes a magnetic transition from the paramagnetic state to the magnetic state of the spin glass when the temperature decreases. Keywords: inorganic compounds, multicomponent vanadates, crystal structure, magnetic properties. DOI: 10.61011/PSS.2023.08.56572.134
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