Control of the ferroelectricity in metastable state for orthorhombic $R$MnO${}_3$ crystals

Abstract

We have investigated orthorhombic $R$MnO${}_3$ ($R$=(Gd${}_{1-y}$Tb${}_y$)) crystals near the phase boundary between the paraelectric $A$-type-antiferromagnetic (AF) phase (PA) and the ferroelectric transverse-spiral-AF one (FS). The spiral AF structure breaks inversion symmetry and induces the ferroelectric polarization through the inverse Dzyaloshinskii-Moriya (DM) interaction. We have found that the PA-FS phase boundary is located at around 0.15$<$$y$$<$0.2. In $y$=0.15 compound, PA and FS phases appear in cooling scan, while FS is not observed in warming scan. This result suggests that FS observed in $y$=0.15 is a metastable state arising from the competition between PA and FS. Furthermore, we demonstrate the phase control between these competing phases by the application of the external magnetic field and external quasihydrostatic pressure.

arXiv comment6 pages, 3 figures, proceeding of Highly Frustrated Magnetism 2006,to be published in the Journal of Physics: Condensed Matter

References in corpus (8)

• Spin current and magneto-electric effect in non-collinear magnets
• Ferroelectricity in spiral magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
• Distorted Perovskite with e_g^1 Configuration as a Frustrated Spin System
• Magnetic-Field and External-Pressure Effect on Ferroelectricity in Manganites: Comparison between GdMnO${}_3$ and TbMnO${}_3$
• Magnetic-Field and External-Pressure Control of Ferroelectricity in Multiferroic Manganites
• Control of ferroelectric phase by chemical pressure in (Gd,Tb)MnO${}_3$ crystals

Cited by in corpus (1)

• Persistent and Reversible Phase Control in GdMnO${}_3$ near the Phase Boundary