Abstract
The magnetic ordering in the stacked triangular antiferromagnet CsMnBr3 has been studied in an applied electric field. The value of the critical exponent β decreases from 0.245(5) (E = 0 V/cm) to 0.165(5) (E = 1.5 kV/cm). Our observations indicate the possible occurrence of a first order phase transition to a non-chiral, commensurate, linear phase in the presence of an applied electric field in the plane of the ordering vector.