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Dielectric properties ofPb5Ge3O11:
Cu2+ crystals
Kudzin A.Yu., Volnianskii M.D., Duda V.M., Trubitsyn M.P., Ermakov
A.S.
Physical Department of Dnipropetrovsk State University,
13 Naukoviy side-str. Dnipropetrovsk, 320625 Ukraine
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The peculiarities of dielectric behavior caused by off-center Cu2+ ions
relaxation dynamics in Pb5Ge3O11 crystals are presented. The relaxation
frequency (t0-1
@1012
sec-1) and activation energy (D W = 0.24 eV)
of Cu2+ thermal hopping between off-center positions are coincided with
results of ESR experiment. Observed additional dielectric loss peaks may
be attributed to OH- groups located in structural tunnels along polar axis
Key words: dielectric relaxation, off-center impurity ion, structural
tunnels, hydroxyl group
doi: 10.3116/16091833/1/1/53/2000 |
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