Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2006-11-20
J. Magn. Magn. Mater. 310, 1311 (2007).
Physics
Condensed Matter
Disordered Systems and Neural Networks
4 pages, 1 figure, to be published in J. Magn. Magn. Mater. (ICM2006)
Scientific paper
10.1016/j.jmmm.2006.10.479
We have investigated the kagom\'{e} ice state in the frustrated pyrochlore oxide Dy_{2}Ti_{2}O_{7} under magnetic field along a [111] axis. Spin correlations have been measured by neutron scattering and analyzed by Monte-Carlo simulation. The kagom\'{e} 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 Dy_{2}Ti_{2}O_{7} 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 kagom\'{e} ice manifold .
Aso Naofumi
Fåk B.
Hiroi Zenji
Kadowaki Hiroaki
Matsuhira Kazuyuki
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