Department of Physics Papers

Document Type

Journal Article

Date of this Version

6-29-2007

Publication Source

Physical Review Letters

Volume

98

Start Page

267205-1

Last Page

267205-4

DOI

10.1103/PhysRevLett.98.267205

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.

Included in

Physics Commons

Share

COinS
 

Date Posted: 20 August 2015

This document has been peer reviewed.