Field-induced transitions in a Kagomeá antiferromagnet

A study of thermal order by disorder effect in magnetic field for a classical antiferromagnet on the Kagome lattice was performed. A unique H-T phase diagram for the strongly frustrated magnet was predicted using analytical arguments. The frustrated magnetic states were a coplanar and a uniaxial triatic order parameter at low and high magnetic fields and an incompressible collinear spin-liquid state at one-third of the saturation field.