Giant Magnetic Interaction (Condon Domains) in Two Dimensions

Abstract

We observe clear evidence for formation of a field-induced two-phase state in ${\mathrm{Br}}_{2}$-intercalated graphite. This is the first time such an effect has been seen in a two-dimensional system, and the sharpness of the features is quite extraordinary. We also observe possible manifestations of domain-wall dynamics in the two-phase regime.