Dielectric and Mechanical Response of Ice Ih Single Crystals and Its Interpretation
| Autor: | Alan H. Runck, W. B. Westphal, A. von Hippel, R. Mykolajewycz |
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| Rok vydání: | 1972 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 57:2560-2571 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.1678624 |
| Popis: | After a short introduction of the status quo and of the experimental distinction between continuous distributions of relaxation time and discrete spectra, it is shown that in our best Ice Ih single crystals seven discrete relaxation spectra can be identified in the frequency range from 8 × 10−3 to 105 Hz. The experimental determination of the molecular origin of these ``standard'' spectra is the main theme of our investigation. Evidence is provided by the magnitude and temperature dependence of the relaxation times τ and polarization contributions Δ κ′ of the various spectra and the influence of imperfections, multicrystallinity, and of HF doping on these characteristics. Spectrum 3, representing the normal volume polarization of ice, can be explained satisfactorily by the dipole moments inscribed by field‐directed diffusion of Bjerrum L, D defects into the proton memory system; destruction of the single crystal produces a cheaper L‐D supply, reduction of the diffusion distance, and a new spectrum 3A of i... |
| Databáze: | OpenAIRE |
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