Phase transition investigation of ferroelectric and dielectric properties of (NH 2 CH 2 COOH) 3 H 2 SO 4 crystal using green function method and two sublattice PLCM model Hamiltonian

Abstract The Greens function technique and extended two sublattice pseudospin lattice coupled-mode (PLCM) model Hamiltonian have been applied to study the phase transition mechanism in ( NH 2 CH 2 COOH ) 3 H 2 SO 4 compound. The two sublattice PLCM model Hamiltonian is modified by considering anharm...

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Published inPhysica scripta Vol. 99; no. 11; p. 115948
Main Authors Iqbal Khan, Muzaffar, Upadhyay, Riya, Chandra Upadhyay, Trilok, Asghar Shah, Ali
Format Journal Article
LanguageEnglish
Published 01.11.2024
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Abstract Abstract The Greens function technique and extended two sublattice pseudospin lattice coupled-mode (PLCM) model Hamiltonian have been applied to study the phase transition mechanism in ( NH 2 CH 2 COOH ) 3 H 2 SO 4 compound. The two sublattice PLCM model Hamiltonian is modified by considering anharmonic phonon interactions, extra spin-lattice interactions, and an external applied electric field term. By using the double-time thermal-dependent Green function technique, the theoretical equations for the total shift, total width, normal mode frequency, transition temperature, relative permittivity, dielectric tangent loss, acoustic attenuation and spontaneous polarization are derived. By fitting the distinct model parameters in the theoretical equations, we calculated the temperature dependence of normal mode frequency, relative permittivity, tangent loss, acoustic attenuation and spontaneous polarization. The numerically obtained results are hold well and correlated with experimental data.
AbstractList Abstract The Greens function technique and extended two sublattice pseudospin lattice coupled-mode (PLCM) model Hamiltonian have been applied to study the phase transition mechanism in ( NH 2 CH 2 COOH ) 3 H 2 SO 4 compound. The two sublattice PLCM model Hamiltonian is modified by considering anharmonic phonon interactions, extra spin-lattice interactions, and an external applied electric field term. By using the double-time thermal-dependent Green function technique, the theoretical equations for the total shift, total width, normal mode frequency, transition temperature, relative permittivity, dielectric tangent loss, acoustic attenuation and spontaneous polarization are derived. By fitting the distinct model parameters in the theoretical equations, we calculated the temperature dependence of normal mode frequency, relative permittivity, tangent loss, acoustic attenuation and spontaneous polarization. The numerically obtained results are hold well and correlated with experimental data.
Author Asghar Shah, Ali
Upadhyay, Riya
Chandra Upadhyay, Trilok
Iqbal Khan, Muzaffar
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Snippet Abstract The Greens function technique and extended two sublattice pseudospin lattice coupled-mode (PLCM) model Hamiltonian have been applied to study the...
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Title Phase transition investigation of ferroelectric and dielectric properties of (NH 2 CH 2 COOH) 3 H 2 SO 4 crystal using green function method and two sublattice PLCM model Hamiltonian
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