Novel ordering of the pyrochlore Heisenberg antiferromagnet with the ferromagnetic next-nearest-neighbour interaction

Novel ordering of the pyrochlore Heisenberg antiferromagnet with the ferromagnetic next-nearest-neighbour interaction

The ordering property of the classical pyrochlore Heisenberg antiferromagnet with the ferromagnetic next-nearest-neighbour interaction is investigated by means of a Monte Carlo simulation. The model is found to exhibit a first-order transition at a finite temperature into a peculiar ordered state. W...

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Veröffentlicht in:Journal of physics. Condensed matter 2007-04, Vol.19 (14), p.145273-145273 (6)
Hauptverfasser: Tsuneishi, Daisuke, Ioki, Masayuki, Kawamura, Hikaru
Format: Artikel
Sprache:eng
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Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
General theory and models of magnetic ordering
Magnetic properties and materials
Physics
Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
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container_issue 14
container_start_page 145273
container_title Journal of physics. Condensed matter
container_volume 19
creator Tsuneishi, Daisuke
Ioki, Masayuki
Kawamura, Hikaru
description The ordering property of the classical pyrochlore Heisenberg antiferromagnet with the ferromagnetic next-nearest-neighbour interaction is investigated by means of a Monte Carlo simulation. The model is found to exhibit a first-order transition at a finite temperature into a peculiar ordered state. While the spin structure factor, i.e. the thermal average of the squared Fourier amplitude of the spin, exhibits a finite long-range order characterized by the commensurate spin order of period four, the thermal average of the spin itself almost vanishes. This means that although the amplitude of the spin Fourier component is long-range ordered the associated phase degree of freedom remains fluctuating.
doi_str_mv 10.1088/0953-8984/19/14/145273
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subjects Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
General theory and models of magnetic ordering
Magnetic properties and materials
Physics
Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
title Novel ordering of the pyrochlore Heisenberg antiferromagnet with the ferromagnetic next-nearest-neighbour interaction
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