Electric field control of the magnetic chiralities in ferroaxial multiferroic RbFe(MoO4)2

Abstract

The coupling of magnetic chiralities to the ferroelectric polarisation in multiferroic RbFe(MoO${}_4$)${}_2$ is investigated by neutron spherical polarimetry. Because of the axiality of the crystal structure below $T_{\text{c}}$ = 190 K, helicity and triangular chirality are symmetric-exchange coupled, explaining the onset of the ferroelectricity in this proper-screw magnetic structure - a mechanism that can be generalised to other systems with "ferroaxial" distortions in the crystal structure. With an applied electric field we demonstrate control of the chiralities in both structural domains simultaneously.

5 pages, 4 figures

References in corpus (3)

• Spin current and magneto-electric effect in non-collinear magnets
• Role of the Dzyaloshinskii-Moriya interaction in multiferroic perovskites
• Direct transition from a disordered to a multiferroic phase on a triangular lattice

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