Phys. Rev. B 66, 064105 (2002) [7 pages]Dipolar ordering and relaxations in acetonitrile-β-hydroquinone clathrateReceived 23 January 2002; published 13 August 2002 Single crystals of this clathrate have been studied by measurements of the frequency and temperature dependent dielectric permittivity as well as with polarization-electric field cycles and x-ray diffraction. The dipole moments of the acetonitrile guest molecules form Ising chains that are coupled by the electric dipole-dipole interaction and that are arranged in a triangular array. At 345 K a phase transition from a partially disordered antiferroelectric to a ferrielectric arrangement is observed. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.064105
DOI:
10.1103/PhysRevB.66.064105
PACS:
64.60.Cn, 64.70.Pf, 77.22.Ch, 77.22.Ej
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