title: Field-induced transitions in a kagomé antiferromagnet.
abstract: The thermal order by disorder effect in magnetic field is studied for a classical Heisenberg antiferromagnet on the Kagomé lattice. Using analytical arguments we predict a unique H- T phase diagram for this strongly frustrated magnet: states with a coplanar and a uniaxial triatic order parameter, respectively, at low and high magnetic fields and an incompressible collinear spin-liquid state at one-third of the saturation field. We also present the Monte Carlo data which confirm the existence of these phases.
authors.affiliation: European Synchrotron Radiation Facility, BP 220, Grenoble F-38043, France.
authors.forename: M E
authors.initials: ME
authors.lastname: Zhitomirsky