Multiferroicity with high-Tc in ceramics of the YBaCuFeO5 ordered perovskite

Abstract

A dielectric anomaly has been found near the incommensurate to commensurate antiferromagnetic phase transition (TN2=230 K) in YBaCuFeO5 ceramics, a compound which crystallizes in an ordered perovskite structure. The existence of electric polarization below TN2 suggests the magnetism induced charge polarization effect that is also confirmed by its strong magnetic field dependence below TN2. Accordingly, the peak near TN2 of the magnetodielectric effect indicates a maximum of magnetodielectric susceptibility near the spin reorientation transition. Considering the abundance of magnetic compounds which structures derive from the perovskite, these results might open up the way toward the control of electric polarization near room temperature.

3 pages, 5 figures, journal paper

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• Multiferroics: different ways to combine magnetism and ferroelectricity
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Cited by in corpus (7)

• Tuning magnetic spirals beyond room temperature with chemical disorder
• Incommensurate magnetic structure, Fe/Cu chemical disorder and magnetic interactions in the high-temperature multiferroic YBaCuFeO5
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• Tuning the tilting of the spiral plane by Mn doping in YBaCuFeO5 multiferroic
• Magnetic properties of a highly ordered single crystal of the layered perovskite YBaCuFe${}_{0.95}$Mn${}_{0.05}$O${}_5$
• Low temperature magnetic and dielectric properties of LnBaCuFeO5 (Ln = Nd, Eu, Gd, Ho and Yb)
• Orbitally driven spin reorientation in Mn doped YBaCuFeO${}_5$