Abstract
Solid phases FexNi1-x(Htrz)3(NO3)2 · H2O (0.4 ≤ x ≤ 0.8$) and Ni(Htrz)3(NO3)2 · H2O were synthesized and studied. The phases were studied by means of magnetochemistry, powder X‐ray difraction analysis, and electronic and IR spectroscopy. The heterometallic phases are described by the stoichiographic method of differentiating dissolution (DD). The values of x were determined by two methods — atomic absorption and DD. Magnetochemical data showed that the solid phases exhibit a high‐temperature 1A1 ⇔5T2 0.5 ≤ x ≤ 0.8 and disappears at x = 0.4. The spin transition is accompanied by thermochromism (color changed from pink to white at 0.6 ≤ x ≤ 1 and from pink to light lilac at x = 0.5). A decrease in x leads to a decrease in the temperature of the forward (under heating Tc ↑) and reverse (under cooling Tc ↓) transitions, a decrease in hysteresis value (Δ Tc), and a “smearing” of the spin transition.
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Shakirova, O.G., Shvedenkov, Y.G., Naumov, D.Y. et al. 1A1⇔5T2 Spin Transition in Heterometallic Solid Phases FexNi1-x(Htrz)3(NO3)2 · H2O (Htrz = 1,2,4‐Triazole). Journal of Structural Chemistry 43, 601–607 (2002). https://doi.org/10.1023/A:1022092319019
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DOI: https://doi.org/10.1023/A:1022092319019