Abstract
The magnetic, dielectric, and ferroelectric properties of Eu1 − x Ho x MnO3 single crystals (0 < x ≤ 0.5), where magnetic ordering can be varied from the canted antiferromagnetic phase to modulated spin structures, have been studied. It has been found that a ferroelectric state appears at x ≥ 0.2 and low temperatures. As the temperature decreases and the holmium content increases, the electric polarization in this state is reoriented from the a axis to the c axis. It has been shown that the polarization is reoriented owing to a change in the spin rotation plane in the cycloidal phase from the ab to cb plane because of the stabilization of the latter upon an increase in the rare-earth contribution to the anisotropy energy. The T-x phase diagram of magnetic and ferroelectric states has been constructed.
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Original Russian Text © V.Yu. Ivanov, A.A. Mukhin, V.V. Glushkov, A.M. Balbashov, 2013, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2013, Vol. 97, No. 1, pp. 32–37.
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Ivanov, V.Y., Mukhin, A.A., Glushkov, V.V. et al. Spontaneous reorientation of the electric polarization in Eu1 − x Ho x MnO3 multiferroics. Jetp Lett. 97, 28–33 (2013). https://doi.org/10.1134/S0021364013010037
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DOI: https://doi.org/10.1134/S0021364013010037