AI Article Synopsis
- The first observation of a direct transition from a paramagnetic and paraelectric state to an incommensurate multiferroic phase in RbFe(MoO4)(2) is reported.
- Ferroelectricity occurs when the magnetic structure exhibits chirality, resulting in the breaking of inversion symmetry.
- A Landau expansion analysis shows that chiral magnetic order can induce a pseudoelectric field, with its temperature response aligning with experimental findings.
Article Abstract
We report the first direct transition from a paramagnetic and paraelectric phase to an incommensurate multiferroic in the triangular lattice antiferromagnet RbFe(MoO4)(2). Ferroelectricity is observed only when the magnetic structure has chirality and breaks inversion symmetry. A Landau expansion of symmetry-allowed terms in the free energy demonstrates that chiral magnetic order can give rise to a pseudoelectric field, whose temperature dependence agrees with experiment.
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| http://dx.doi.org/10.1103/PhysRevLett.98.267205 | DOI Listing |
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