Origin of low-frequency dielectric dispersion in KH2PO4 and RbH2PO4 ferroelectric crystals

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We have measured the low-frequency dielectric dispersions in KH2PO4 and RbH2PO4 crystals. In the paraelectric phase both crystals were observed to be free of dielectric dispersion in the low-frequency region concerned. However, both of them exhibited the low-frequency dielectric dispersion in the ferroelectric phase. Our study of the temperature-dependent dielectric relaxation in the ferroelectric phase supports that the major part of the low-frequency dielectric dispersion observed should be originated from the domain wall relaxations rather than the heat diffusion central peak of recent reports.
Publisher
Amer Physical Soc
Issue Date
1999-06
Language
English
Article Type
Article
Keywords

DIFFUSION CENTRAL PEAK; MACROSCOPIC SUSCEPTIBILITIES; PHASE; KDP

Citation

PHYSICAL REVIEW B, v.59, no.21, pp.13509 - 13512

ISSN
1098-0121
URI
http://hdl.handle.net/10203/69155
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