Phys. Rev. Lett. 88, 057204 (2002) [4 pages]Field-Induced Transitions in a Kagomé AntiferromagnetReceived 1 August 2001; published 22 January 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.057204
DOI:
10.1103/PhysRevLett.88.057204
PACS:
75.10.Hk, 75.30.Kz, 75.40.Cx, 75.50.Ee
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