Abstract
The neodymium ferroborate NdFe3(BO3)4 undergoes an antiferromagnetic transition at T N = 30 K, which manifests itself as a λ-type anomaly in the temperature dependence of the specific heat C and as inflection points in the temperature dependences of the magnetic susceptibility χ measured at various directions of an applied magnetic field with respect to the crystallographic axes of the sample. Magnetic ordering occurs only in the subsystem of Fe3+ ions, whereas the subsystem of Nd3+ ions remains polarized by the magnetic field of the iron subsystem. A change in the population of the levels of the ground Kramers doublet of neodymium ions manifests itself as Schottky-type anomalies in the C(T) and χ(T) dependences at low temperatures. At low temperatures, the magnetic properties of single-crystal NdFe3(BO3)4 are substantially anisotropic, which is determined by the anisotropic contribution of the rare-earth subsystem to the magnetization. The experimental data obtained are used to propose a model for the magnetic structure of NdFe3(BO3)4.
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Original Russian Text © E.A. Popova, N. Tristan, C. Hess, R. Klingeler, B. Büchner, L.N. Bezmaternykh, V.L. Temerov, A.N. Vasil’ev, 2007, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2007, Vol. 132, No. 1, pp. 121–124.
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Popova, E.A., Tristan, N., Hess, C. et al. Magnetic and thermal properties of single-crystal NdFe3(BO3)4 . J. Exp. Theor. Phys. 105, 105–107 (2007). https://doi.org/10.1134/S1063776107070229
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DOI: https://doi.org/10.1134/S1063776107070229