title: Field-Tuned Order by Disorder in Frustrated Ising Magnets with Antiferromagnetic Interactions.
abstract: We demonstrate the appearance of thermal order by disorder in Ising pyrochlores with staggered antiferromagnetic order frustrated by an applied magnetic field. We use a mean-field cluster variational method, a low-temperature expansion, and Monte Carlo simulations to characterize the order-by-disorder transition. By direct evaluation of the density of states, we quantitatively show how a symmetry-broken state is selected by thermal excitations. We discuss the relevance of our results to experiments in 2D and 3D samples and evaluate how anomalous finite-size effects could be exploited to detect this phenomenon experimentally in two-dimensional artificial systems, or in antiferromagnetic all-in-all-out pyrochlores like Nd_{2}Hf_{2}O_{7} or Nd_{2}Zr_{2}O_{7}, for the first time.
authors: Instituto de Investigaciones Físicas de Mar del Plata (IFIMAR), UNMdP-CONICET, 7600 Mar del Plata, Argentina.
authors: P C
authors: PC
authors: Guruciaga
authors: Université Pierre et Marie Curie-Paris 6, Laboratoire de Physique Théorique de la Matière Condensée, 4, Place Jussieu, Tour 13, 5ème étage, 75252 Paris Cedex 05, France.
authors: M
authors: M
authors: Tarzia
authors: Instituto de Física de Líquidos y Sistemas Biológicos (IFLYSIB), UNLP-CONICET, 1900 La Plata, Argentina.
authors: M V
authors: MV
authors: Ferreyra
authors: Université Pierre et Marie Curie-Paris 6, Laboratoire de Physique Théorique et Hautes Energies, 4, Place Jussieu, Tour 13, 5ème étage, 75252 Paris Cedex 05, France.
authors: L F
authors: LF
authors: Cugliandolo
authors: Instituto de Física de Líquidos y Sistemas Biológicos (IFLYSIB), UNLP-CONICET, 1900 La Plata, Argentina.|School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS, United Kingdom.
authors: S A
authors: SA
authors: Grigera
authors: Instituto de Física de Líquidos y Sistemas Biológicos (IFLYSIB), UNLP-CONICET, 1900 La Plata, Argentina.
authors: R A
authors: RA
authors: Borzi