Theoretical study of ferroelectric triglycine sulphate (TGS) crystal in external electric fields

• Autorzy: Upadhyay T. Ch. , Nautiyal A.
• Języki publikacji: EN

Abstrakty

EN

A modified two sub-lattice pseudospin-lattice coupled mode model of Mitsui et al [Phys. Rev., 111 (1958) 1259] by adding third, fourth order phonon anharmonic interaction and external electric field terms has been applied to ferroelectric triglycine sulphate crystal. Electric field dependence of ferroelectric, dielectric and acoustical properties has been studied. With the help of double time temperature dependent Green’s function method, expressions for shift, width, soft mode frequency, dielectric constant, loss tangent and acoustic attenuation have been derived. Numerically calculations have been made and results have been compared with experimental data reported by Bye et al [Ferroelectrics 4 (1974) 243] and Shreekumar et al [Ferroelectrics 160 (1994) 23] for TGS crystal and a good agreement has been observed.

Słowa kluczowe

EN

ferroelectric; Green's functions; anharmonic; dielectric constant; loss tangent; coustic attenuation

• Wydawca: Przedsiębiorstwo Wydawnictw Naukowych "DARWIN"
• Czasopismo: International Letters of Chemistry, Physics and Astronomy
• Rocznik: 2013
• Tom: Vol. 6
• Strony: 54--65
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Upadhyay T. Ch.

autor

Nautiyal A.

• Department of Physics, School of Sciences, H.N.B. Garhwal University (A Central University),

Bibliografia

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