Abstract
We report on the synthesis conductions and results of experimental investigations of the crystal structure and magnetic properties of a new magnetic compound YbFeTi2O7. According to the X-ray diffractometry data, the crystal structure of the investigated compound is described by the rhombic space group Pcnb with unit cell parameters of a = 9.8115(1) Å, b = 13.5106(2) Å, and c = 7.31302(9) Å and atomic disordering in the distribution of iron ions Fe3+ over five structural sites. The magnetic measurements in the lowtemperature region revealed a kink in the temperature dependence of the magnetic moment and its dependence on the sample magnetic prehistory. The experimental results obtained suggest that with a decrease in temperature the sample passes from the paramagnetic state to the spin-glass-like magnetic state characterized by a freezing temperature of T f = 4.5 K at the preferred antiferromagnetic exchange coupling in the sample spin system. The chemical pressure variation upon replacement of rare-earth ion R by Yb in the RFeTi2O7 system does not change the crystal lattice symmetry and magnetic state.
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Original Russian Text © T.V. Drokina, G.A. Petrakovskii, M.S. Molokeev, D.A. Velikanov, 2018, published in Fizika Tverdogo Tela, 2018, Vol. 60, No. 3, pp. 526–530.
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Drokina, T.V., Petrakovskii, G.A., Molokeev, M.S. et al. Synthesis, Crystal Structure, and Magnetic Properties of the YbFeTi2O7 Compound. Phys. Solid State 60, 532–536 (2018). https://doi.org/10.1134/S1063783418030095
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DOI: https://doi.org/10.1134/S1063783418030095