Abstract
The magnetic, magnetoelectric, and magnetoelastic properties of a PrFe3(BO3)4 single crystal and the phase transitions induced in this crystal by the magnetic field are studied both experimentally and theoretically. Unlike the previously investigated ferroborates, this material is characterized by a singlet ground state of the rare-earth ion. It is found that, below T N = 32 K, the magnetic structure of the crystal in the absence of the magnetic field is uniaxial (l ∥ c), while, in a strong magnetic field H ∥ c (H cr ∼ 43 kOe at T = 4.2 K), a Fe3+ spin reorientation to the basal plane takes place. The reorientation is accompanied by anomalies in magnetization, magnetostriction, and electric polarization. The threshold field values determined in the temperature interval 2–32 K are used to plot an H-T phase diagram. The contribution of the Pr3+ ion ground state to the parameters under study is revealed, and the influence of the praseodymium ion on the magnetic and magnetoelectric properties of praseodymium ferroborate is analyzed.
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Original Russian Text © A.M. Kadomtseva, Yu.F. Popov, G.P. Vorob’ev, A.A. Mukhin, V.Yu. Ivanov, A.M. Kuz’menko, L.N. Bezmaternykh, 2008, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2008, Vol. 87, No. 1, pp. 45–50.
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Kadomtseva, A.M., Popov, Y.F., Vorob’ev, G.P. et al. Influence of the ground state of the Pr3+ ion on magnetic and magnetoelectric properties of the PrFe3(BO3)4 multiferroic. Jetp Lett. 87, 39–44 (2008). https://doi.org/10.1134/S0021364008010104
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DOI: https://doi.org/10.1134/S0021364008010104