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Short-range ordering and freezing in a randomly mixed ferroelectric-antiferroelectric crystal

Courtens, Eric and Rosenbaum, T. F. and Nagler, S. E. and Horn, P. M. (1984) Short-range ordering and freezing in a randomly mixed ferroelectric-antiferroelectric crystal. Physical Review B, 29 (1). pp. 515-518. ISSN 1098-0121. doi:10.1103/PhysRevB.29.515.

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X-ray measurements on single-crystals of Rb_(1−x)(NH_4)_xH_2PO_4 trace the development of a glasslike state. The absence of macroscopic crystal-symmetry change during freezing is confirmed, while diffuse scattering reveals the growth of very-short-range order. The latter coincides with a compressibility anomaly seen in Brillouin scattering and with dielectric effects suggesting freezing. The system is in many ways analogous to spin-glasses.

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Additional Information:© 1984 The American Physical Society. Received 30 September 1983. We would like to thank S. von Molnar for his preliminary specific-heat measurement, and G. Grinstein and E. Pytte for helpful discussions, as well as P. Bayer for his careful growth and cutting of the fragile single-crystal platelets. One of us (S.E.N.) was supported by a Natural Science and Engineering Research Council of Canada fellowship.
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Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
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ID Code:47046
Deposited By: George Porter
Deposited On:09 Jul 2014 14:40
Last Modified:10 Nov 2021 17:33

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