Internal magnetic field effect on magnetoelectricity in orthorhombic $RMn{O}_3$ crystals

Abstract

We have investigated the role of the 4$f$ moment on the magnetoelectric (ME) effect of orthorhombic $R$MnO${}_3$ ($R$=rare earth ions). In order to clarify the role of the 4$f$ moment, we prepared three samples: (Eu,Y)MnO${}_3$ without the 4$f$ moment, TbMnO${}_3$ with the anisotropic 4$f$ moment, and (Gd,Y)MnO${}_3$ with the isotropic 4$f$ moment. The ferroelectric behaviors of these samples are different from each other in a zero magnetic field. (Eu,Y)MnO${}_3$ and (Gd,Y)MnO${}_3$ show the ferroelectric polarization along the a axis in the ground state, while TbMnO${}_3$ shows it along the c axis. Such difference may arise from the influence of the anisotropic Tb${}^{3+}$ 4$f$ moment. The direction of the ferroelectric polarization of $R$MnO${}_3$ is determined by the internal magnetic field arising from the 4$f$ moment.

arXiv comment2 pages, 1 figure, the proceeding of International Conference of Magnetism, to be published in the Journal of Magnetism and Magnetic Materials

References in corpus (6)

• Spin current and magneto-electric effect in non-collinear magnets
• Ferroelectricity in spiral magnets
• Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
• Distorted Perovskite with e_g^1 Configuration as a Frustrated Spin System
• Collinear-to-Spiral Spin Transformation without Changing Modulation Wavelength upon Ferroelectric Transition in Tb1-xDyxMnO3
• Magnetic-field-induced switching between ferroelectric phases in orthorhombic-distortion-controlled $R$MnO${}_3$

Cited by in corpus (4)

• Spin-spiral inhomogeneity as the origin of ferroelectricity in orthorhombic manganites
• Double-exchange theory of ferroelectric polarization in orthorhombic manganites with twofold periodic magnetic texture
• Orbital antiferroelectricity and higher dimensional magnetoelectric order in the spin-$1/2$ XX chain extended with three-spin interactions
• The Effect of $f$-$d$ Magnetic Coupling in Multiferroic $R$MnO${}_3$ Crystals