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  • Title: Field induced ordering in highly frustrated antiferromagnets.
    Author: Zhitomirsky ME, Honecker A, Petrenko OA.
    Journal: Phys Rev Lett; 2000 Oct 09; 85(15):3269-72. PubMed ID: 11019318.
    Abstract:
    We predict that an external field can induce a spin ordering in highly frustrated classical Heisenberg magnets. We find analytically stabilization of collinear states by thermal fluctuations at a one-third of the saturation field for kagome and garnet lattices and at a half of the saturation field for pyrochlore and frustrated square lattices. This effect is studied numerically for the frustrated square-lattice antiferromagnet by Monte Carlo simulations for classical spins and by exact diagonalization for S = 1/2. The field induced collinear states have a spin gap and produce magnetization plateaus.
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