Distribution of correlation radii in disordered ferroelectrics

Glinchuk, M. D.; Eliseev, E. A.; Stephanovich, V. A.; Jastrabik, L.
December 2002
Applied Physics Letters;12/16/2002, Vol. 81 Issue 25, p4808
Academic Journal
The calculation of the correlation radius distribution function is performed for the cases of undamped and overdamped soft mode dispertion laws. Taking into account the correlation radius dependence on the random field and this field distribution function, we carried out the calculation of the correlation radius distribution function dependence on temperature, damping coefficient and random field distribution function parameters. It was shown that in paraelectric phase (T> T[sub d], T[sub d] is the Burns temperature) the most probable value of the correlation radius is equal to its maximal value, independently of the degree of system disorder, while at the dipole glass state it is close to the minimal value, with a broad "tail" of the distribution function in the region of larger radii.


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