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Fizika Tverdogo Tela, 2022 Volume 64, Issue 11, Pages 1781–1787 (Mi ftt11200)

Magnetism

Synthesis, structural and magnetic properties of ludwigite Mn$_{1.32}$Ni$_{0.85}$Cu$_{0.83}$BO$_5$

S. N. Sofronovaa, E. V. Eremina, E. M. Moshkinaa, A. V. Selyaninaa, G. N. Bondarenkob, A. V. Shabanova

a Kirensky Institute of Physics, Federal Research Center KSC SB, Russian Academy of Sciences, Krasnoyarsk, Russia
b Institute of Chemistry and Chemical Technology, Federal Research Center KSC SB RAS, Russian Academy of Sciences, Krasnoyarsk, Russia

Abstract: Single crystals of Mn$_{1.32}$Ni$_{0.85}$Cu$_{0.83}$BO$_5$ with the ludwigite structure were obtained by the solution-melt method during spontaneous crystallization. The concentration of copper, manganese and nickel ions was determined by transmission microscopy. Manganese ions are included in compounds in the divalent and trivalent states. The study of temperature and field dependences showed that we have several magnetic transitions. The first transition, associated with the ferrimagnetic ordering of the magnetic moments of parts of the ions, observed in the region of 50 K. In the region of 25 K, a second magnetic transition is observed. Substitution of nickel ions for copper and divalent manganese of better disorder and competition of exchange interactions, which leads to the division of the magnetic system into several magnetic subsystems that are ordered at different temperatures.

Keywords: ludwigites, magnetic interface transition, indirect exchange interactions.

Received: 07.07.2022
Revised: 07.07.2022
Accepted: 09.07.2022

DOI: 10.21883/FTT.2022.11.53333.425



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