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Correlation radius of polarization fluctuations in the disordered ferroelectrics (2002)

Glinchuk, M. D. ; Eliseev, E. A.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 80 (2002), S. 646-648

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: We calculate correlation radius of polarization fluctuations in the disordered ferroelectrics. The consideration is performed in the model suitable for relaxor ferroelectrics. We consider reference Burns phase in a mean field approximation subjected to random electric field E. The "entire relaxor" is then obtained by averaging of characteristics of the reference phase with distribution function of the random field. For correlation radius (Rc) calculation we take into account the damping of the reference phase soft mode and its dependence on E and perform the averaging over the random field distribution. The obtained temperature dependence of Rc is shown to be strongly dependent on the decay parameter. It appears to be completely different for the disordered system either in the dipole-glass state or in mixed ferroglass phase. The fitting of calculated and measured Rc(T) in PbMg1/3Nb2/3O3 is performed. © 2002 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1430266

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