High polarizability and pyroelectric effect in nonequilibrium nonpolar phases of rubidium dihydroarsenate and potash alum
- Moscow State Univ. (Russian Federation)
In this work, the authors studied the thermodynamically nonequilibrium ferroelectriclike state formed under certain conditions in the nonpolar phases of dielectric crystals with hydrogen bonds. This state forms upon fast cooling of a crystal to temperature at which protons can move from their positions into interstices. Studied were the crystals of a ferroelectric: rubidium dihydroarsenate (RDA) with T{sub c}=110 Kelvin, potash alum, and a linear pyroelectric (barium nitrite monohydrate) over the temperature range 245-303 Kelvin. It was found that rapid cooling of some dielectric crystals with hydrogen bonds results in the formation of a metastable, ferroelectric-like state, which is likely to be associated with the formation and self-organization of a system of flickering dipoles caused by interstitial proton vacancies. Upon rapid cooling, the nonpolar phases of the crystals exhibit anomalous pyroelectric and dielectric properties resembling those of ferroelectrics below the Curie point.
- OSTI ID:
- 98719
- Journal Information:
- Inorganic Materials, Vol. 30, Issue 8; Other Information: PBD: Aug 1994; TN: Translated from Neorganicheskie Materialy; 30: No. 8, 1087-1089(1994)
- Country of Publication:
- United States
- Language:
- English
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