Magnetic digital flop of ferroelectric domain with fixed spin chirality in a triangular lattice helimagnet

Abstract

Ferroelectric properties in magnetic fields of varying magnitude and direction have been investigated for a triangular-lattice helimagnet CuFe1-xGaxO2 (x=0.035). The magnetoelectric phase diagrams were deduced for magnetic fields along [001], [110], and [1-10] direction, and the in-plane magnetic field was found to induce the rearrangement of six possible multiferroic domains. Upon every 60-degree rotation of in-plane magnetic field around the c-axis, unique 120-degree flop of electric polarization occurs as a result of the switch of helical magnetic q-vector. The chirality of spin helix is always conserved upon the q-flop. The possible origin is discussed in the light of the stable structure of multiferroic domain wall.

5 pages, 4 figures. Accepted in Phys. Rev. Lett

References in corpus (6)

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• Switching of antiferromagnetic states in LiCoPO${}_4$ as investigated via the magnetoelectric effect
• Spin-Wave and Electromagnon Dispersions in Multiferroic MnWO4 as Observed by Neutron Spectroscopy: Isotropic Heisenberg Exchange versus Anisotropic Dzyaloshinskii-Moriya Interaction
• On the theory of magnetization in multiferroics: competition between ferro- and antiferromagnetic domains
• Anisotropic magnetic field responses of ferroelectric polarization in a trigonal multiferroic CuFe1-xAlxO2 (x=0.015)
• Control of multiferroic order by magnetic field in frustrated helimagnet MnI${}_2$. Theory
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• Spin-Orbital Driven Ferroelectricity