Critical dynamics of a spin-5/2 2D isotropic antiferromagnet

R. J. Christianson, R. L. Leheny, R. J. Birgeneau +1

We report a neutron scattering study of the dynamic spin correlations in Rb${}_2$MnF${}_4$, a two-dimensional spin-5/2 antiferromagnet. By tuning an external magnetic field to the valu…