Chiral critical exponents of the triangular-lattice antiferromagnet CsMnBr3 as determined by polarized neutron scattering

The critical exponents gamma (c) = 0.84(7) of the chiral susceptibility abo ve the Neel temperature, T-N, and beta (c) = 0.44(2) of the average chirali ty below T-N have been determined for the triangular-lattice antiferromagne t CsMnBr3 by means of polarized neutron scattering. These first experimenta l values of chiral critical exponents are in line with theoretical predicti ons and fulfill their scaling relation. The temperature at which the averag e chirality appears coincides with the spin-order transition temperature, T -N.