TY - JOUR
T1 - Confinement kinetics in a KTN:Cu crystal
T2 - Experiment and theory
AU - Ben Ishai, P.
AU - Agranat, A. J.
AU - Feldman, Yu
PY - 2006
Y1 - 2006
N2 - A dielectric relaxation process with nonmonotonic temperature dependence was observed in KTN:Cu at the ferroelectric phase. The kinetics of this process were interpreted in terms of the free volume model. It is argued that in this system the small Cu+ ions that are frozen in an off center position in the large K+ sites provide the necessary latitude for the relaxation model. The potential field of the relaxing ions is described in terms of the phenomenological Buckingham potential. The temperature dependence of the relaxation time is derived by assuming that the effective ionic radius of the Cu+ ion changes as it shifts in its site. Similar results are obtained when the Lennard-Jones potential is applied.
AB - A dielectric relaxation process with nonmonotonic temperature dependence was observed in KTN:Cu at the ferroelectric phase. The kinetics of this process were interpreted in terms of the free volume model. It is argued that in this system the small Cu+ ions that are frozen in an off center position in the large K+ sites provide the necessary latitude for the relaxation model. The potential field of the relaxing ions is described in terms of the phenomenological Buckingham potential. The temperature dependence of the relaxation time is derived by assuming that the effective ionic radius of the Cu+ ion changes as it shifts in its site. Similar results are obtained when the Lennard-Jones potential is applied.
UR - http://www.scopus.com/inward/record.url?scp=33644787901&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.73.104104
DO - 10.1103/PhysRevB.73.104104
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AN - SCOPUS:33644787901
SN - 1098-0121
VL - 73
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
M1 - 104104
ER -