Abstract—
Detailed dynamic magnetic susceptibility measurements for Fe1 – xAgxCr2S4 (x = 0–0.15) solid solutions have shown that polycrystalline silver-doped iron thiochromite undergoes paramagnetic-to-ferrimagnetic phase transitions with transition temperatures dependent on the degree of silver substitution for iron, TC = 194–212 K at x = 0.05–0.15, and spin glass transitions at Tf = 80–115 K for x = 0.05–0.15. The increase in the transition temperatures with increasing silver concentration is attributable to the diamagnetic dilution effect. The cusp observed around 50 K, due to the low-temperature structural anomaly in the Fe1 – xAgxCr2S4 solid solutions, has been confirmed by measuring the imaginary part of their dynamic magnetic susceptibility as a function of temperature, χ''(T), at an increased field modulation amplitude of 15 Oe. An effect related to long-range orbital ordering as a consequence of a Jahn–Teller transition has been found at temperatures TOO = 10–15 K.
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This work was supported by the Russian Federation Ministry of Science and Higher Education (state research target for the Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, in the field of basic research).
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Aminov, T.G., Shabunina, G.G., Busheva, E.V. et al. Dynamic Magnetic Susceptibility of Silver-Doped Iron Thiochromite. Inorg Mater 58, 7–17 (2022). https://doi.org/10.1134/S0020168522010022
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DOI: https://doi.org/10.1134/S0020168522010022