Dielectric Dispersion in Yttrium and Erbium Formate Dihydrate Crystals
| Autor: | G. L. Slabkaya, N. D. Gavrilova, A. M. Lotonov |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Materials science
Hydrogen bond General Chemical Engineering Metals and Alloys Analytical chemistry chemistry.chemical_element Relative permittivity Dielectric Yttrium Activation energy Atmospheric temperature range Inorganic Chemistry Erbium Nuclear magnetic resonance chemistry Materials Chemistry Relaxation (physics) |
| Zdroj: | Inorganic Materials. 40:270-273 |
| ISSN: | 0020-1685 |
| DOI: | 10.1023/b:inma.0000020526.33091.c5 |
| Popis: | The dielectric properties of Y(HCOO)3 · 2H2O and Er(HCOO)3 · 2H2O are studied. The frequency dependences (0.01 Hz to 20 kHz) of the real (e′) and imaginary (e′′) parts of dielectric permittivity (e = e′ – ie′′) are shown to follow a fractal scaling law for the dielectric response of solids. In the tan δ versus temperature curves, a number of maxima are revealed in a narrow temperature range. The experimental data are used to evaluate the activation energies of relaxation processes. The observed anomalies are assumed to be associated with changes in the dynamics of protons in hydrogen bonds. |
| Databáze: | OpenAIRE |
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