Variation of Cochran's excitation frequency, capacittivity, and dissipation factor in rubidium dihydrogen phosphate crystal.

Ferroelectric materials are getting great interest due to their large applications in modern electronics technology such as memory devices, pyroelectric detectors, modulators, and so on, rubidium dihydrogen phosphate (RDP) is a member of Potassium dihydrogen phosphate family of ferroelectric crystals. In De Gennes–Kobayashi pseudospin model few extra terms like phonon anharmonic terms, extra spin phonon interaction terms, four body interaction terms and electric field terms are included. Dielectric properties have been investigated. Statistical Green function method of Zubarev is employed to derive excitation frequency, capacittivity, and dissipation factor for RDP. Theoretical data are compared to experimental data of other workers for RDP. [ABSTRACT FROM AUTHOR]