The thermal order by disorder effect in magnetic field is studied for a classical Heisenberg antiferromagnet on the kagome 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 parameters respectively at low and high magnetic fields and an incompressible collinear spin-liquid state at a one-third of the saturation field. We also present the Monte Carlo data which confirm existence of these phases.
@article{arxiv.cond-mat/0107608,
title = {Field induced transitions in a kagome antiferromagnet},
author = {M. E. Zhitomirsky},
journal= {arXiv preprint arXiv:cond-mat/0107608},
year = {2007}
}