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09-08U

09-08U


By icmp_admin - Posted on 08 February 2012

UDC: 
537.2; 537.3; 537.9
PACS: 
75.10.Nr, 77.22.Ch, 77.22.Ej, 77.22.Gm, 77.84.Fa

Thermodynamics and dielectric properties of the Rb$_{1-x}$(NH$_4$)$_x$H$_2$PO$_4$ type proton glasses

S.I. Sorokov
R.R. Levitskii
A.S. Vdovych
Z. Trybula

We propose a pseudospin model for proton glasses of the Rb$_{1-x}$(NH$_4$)$_x$H$_2$PO$_4$ type, which takes into account the energy levels of protons around the PO$_4$ group, a long-range interactions between the hydrogen bonds, and an internal random deformational field. Within the framework of a four-particle cluster approximation we derive a system of equations for the variational parameters, and also expressions for spontaneous polarization, molar heat capacity, Edwards-Anderson parameter, static longitudinal and transverse dielectric permittivities. Within the Glauber dynamics approach we have studied the temperature behavior of dielectric permittivities of these compounds at different frequencies.

Year: 
2009
Pages: 
62
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