Abstract
The magnetic susceptibility, heat capacity, and spin-spin correlation functions of manganese oxide Pb3Mn7O15 are calculated by the Monte Carlo method. Two critical temperatures are determined: T 1 ≈ 20 K, above which a modulated structure along the hexagonal axis is formed, and T 2 ≈ 70 K, at which the long-range magnetic order disappears. The antiferromagnetic exchange interaction constant in a hexagonal plane is estimated to be J 1 ∼ 7 K, and the antiferromagnetic and ferromagnetic exchange interaction constants between hexagonal planes are calculated to be J 2 ∼ 3 K and K ∼ 50 K, respectively.
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Original Russian Text © S.S. Aplesnin, A.I. Moskvin, 2009, published in Fizika Tverdogo Tela, 2009, Vol. 51, No. 4, pp. 724–726.
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Aplesnin, S.S., Moskvin, A.I. Simulation of the magnetic properties of manganese oxide Pb3Mn7O15 . Phys. Solid State 51, 767–769 (2009). https://doi.org/10.1134/S1063783409040209
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DOI: https://doi.org/10.1134/S1063783409040209