Abstract
A complex study of the magnetic, electric, magnetoelectric, and magnetoelastic properties of GdMnO3 single crystals has been performed in the low-temperature region in strong pulsed magnetic fields up to 200 kOe. An anomaly of the dielectric constant along the a axis of a crystal has been found at 20 K, where a transition from an incommensurate modulated phase to a canted antiferromagnetic phase, as well as electric polarization along the a and b axes of the crystal induced by the magnetic field H‖ b (H cr ∼ 40 kOe), is observed. Upon cooling the crystal in an electric field, the magnetic-field-induced electric polarization changes its sign depending on the sign of the electric field. The occurrence of the electric polarization is accompanied by anisotropic magnetostriction, which points to a correlation between the magnetoelectric and magnetoelastic properties. Based on these results, it has been stated that GdMnO3 belongs to a new family of magnetoelectric materials with the perovskite structure.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 81, No. 1, 2005, pp. 22–26.
Original Russian Text Copyright © 2005 by Kadomtseva, Popov, Vorob’ev, Kamilov, Pyatakov, Ivanov, Mukhin, Balbashov.
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Kadomtseva, A.M., Popov, Y.F., Vorob’ev, G.P. et al. Specificity of magnetoelectric effects in a new GdMnO3 magnetic ferroelectric. Jetp Lett. 81, 19–23 (2005). https://doi.org/10.1134/1.1881729
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DOI: https://doi.org/10.1134/1.1881729