Field Induced Ordering in Highly Frustrated Antiferromagnets

M. E. Zhitomirsky, A. Honecker, and O. A. Petrenko
Phys. Rev. Lett. 85, 3269 – Published 9 October 2000
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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.

  • Received 20 March 2000

DOI:https://doi.org/10.1103/PhysRevLett.85.3269

©2000 American Physical Society

Authors & Affiliations

M. E. Zhitomirsky1, A. Honecker2, and O. A. Petrenko3,4

  • 1Theoretische Physik, ETH Hönggerberg, CH-8093 Zürich, Switzerland
  • 2Institut für Theoretische Physik, TU Braunschweig, Mendelssohnstrasse 3, D-38106 Braunschweig, Germany
  • 3ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, United Kingdom
  • 4University of Warwick, Department of Physics, Coventry CV4 7AL, United Kingdom

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Vol. 85, Iss. 15 — 9 October 2000

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