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Creep and relaxation dynamics of domain walls in periodically poled KTiOPO4
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UNSPECIFIED (2005) Creep and relaxation dynamics of domain walls in periodically poled KTiOPO4. PHYSICAL REVIEW LETTERS, 94 (11). -. doi:10.1103/PhysRevLett.94.117601 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.94.117601
Abstract
Creep and relaxation of domain walls under ac electric fields are observed in an ideal model system, periodically poled KTiOPO4, to occur in different regimes, which are separated by dynamic phase transitions at frequencies f(m) (T) = f(m0) exp (-Delta E/k(B)T), with f(m0) = 3 x 10(9) Hz and Delta E = 0.6 eV. Power law dispersion of the creep susceptibility, X proportional to 1 + (i omega tau)(-beta), with beta approximate to 0.4, and large nonlinearity encountered at f < f(m), is contrasted with Cole-Cole-type relaxational dispersion, X proportional to (1 + (i omega tau)(1-a))(-1), with alpha approximate to 0.3, at f > f(m).
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Journal or Publication Title: | PHYSICAL REVIEW LETTERS | ||||
| Publisher: | AMERICAN PHYSICAL SOC | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 25 March 2005 | ||||
| Dates: |
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| Volume: | 94 | ||||
| Number: | 11 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | - | ||||
| DOI: | 10.1103/PhysRevLett.94.117601 | ||||
| Publication Status: | Published |
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