0000000000246804

AUTHOR

Domingos De Sousa Meneses

showing 2 related works from this author

Evidence for a glassy dynamics in (Rb-NH 4 ) 2 SO 4 mixed compounds

1996

An orientational glass behavior is evidenced in a [Rb0.7(NH4)0.3]2SO4 mixed crystal. Dielectric experiments (1 kHz–250 MHz) performed along the c-axis evidenced a polydispersive relaxation process. Its temperature dependence follows a Vogel-Fulcher law with a freezing temperature of 12 K.

Materials scienceMixed crystalCondensed matter physicsDynamics (mechanics)Relaxation processGeneral Physics and AstronomyDielectricOrientational glassEurophysics Letters (EPL)
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Ferroelectricity and orientational glass behavior in the [Rbx(NH4)1−x]2SO4system

1996

Abstract The ordering in the electric dipole subsystem of the [Rbx(NH4)1−x]22SO4 family is investigated. The microscopic origin of ferroelectricity for x=0 is discussed, and evidences for the existence of orientational glass behavior in highly substituted crystals are presented.

DipoleMaterials scienceCondensed matter physicsCondensed Matter PhysicsOrientational glassFerroelectricityElectronic Optical and Magnetic MaterialsFerroelectrics
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