Spin correlation in kagome ice state:: Neutron scattering study of the dipolar spin ice Dy2Ti2O7 under magnetic field along [111]

[摘要] We have investigated the kagome ice state in the frustrated pyrochlore oxide Dy2Ti2O7 under magnetic field along a [1 1 1] axis. Spin correlations have been measured by neutron scattering and analyzed by Monte Carlo simulation. The kagome ice state, which has a non-vanishing residual entropy well established for the nearest-neighbor spin ice model by the exact solution, has been proved to be realized in the dipolar-interacting spin ice Dy2Ti2O7 by observing the characteristic spin correlations. The simulation shows that the long-range interaction gives rise to only weak lifting of the ground state degeneracy and that the system freezes within the degenerate kagome ice manifold. (c) 2006 Elsevier B.V. All rights reserved.

[发布日期] 2007-03-01

[效力级别]  Proceedings Paper

[关键词] geometrical frustration;spin ice;kagome ice;spin correlations;neutron scattering