Peculiarities of the Frequency Dependences of the Dislocation Decrement of Ultrasound Attenuation for Ionic Crystals with Radiation Defects and ImpuritiesОсобливості частотних залежностей дислокаційного декременту затухання ультразвуку для іонних кристалів з радіаційними дефектами і домішками
| Authors | O.M. Petchenko1 , , A.V. Bezougly1 , A.V. Poyda2 , O.M. Didenko1 , S.M. Boiko1, G.O. Petchenko1 |
| Affiliations | 1O.M. Beketov Kharkiv National University of Urban Economy, 61002 Kharkiv, Ukraine 2National Science Center Kharkov Institute of Physics and Technology of the NASU, 61108 Kharkiv, Ukraine |
| Е-mail | glibpetchenko@gmail.com |
| Issue | Volume 18, Year 2026, Number 1 |
| Dates | Received 15 April 2026; revised manuscript received 14 August 2026; published online 2 August 2026 |
| Citation | O.M. Petchenko, , A.V. Bezougly, и др., J. Nano- Electron. Phys. 18 No 1, 01001 (2026) |
| DOI | https://doi.org/ |
| PACS Number(s) | 62.40 + i, 62.72 – Hh |
| Keywords | Dislocation decrement, Deformation (8) , Irradiation (10) , Dislocation (9) , Coefficient of dynamic damping, Impurities. . |
| Annotation | An analysis of frequency dependences of dislocation decrement of ultrasound attenuation Δd(f) behavior in KBr, LiF and NaCl crystals was performed in experiments with variable temperature T and dislocation density Λ of crystals, as well as with variations in dose of X-irradiation in the studied samples. It is shown that, unlike the experiments with variable T and Λ, where the high-frequency asymptotes of the Δd(f) curves were represented by families of straight lines, in the experiments with X-irradiated samples, a fundamental difference is observed – they merge into a single straight line. Within the framework of the key relationship of the Granato-Lücke theory, which describes the behavior of dynamic and structural characteristics based on the data of the post-resonance region of the curves Δd(f), obtained within the framework of the amplitude-independent internal friction method, the justification of the obtained results of experiments with the variables T, Λ and the X-irradiation dose was made. A prediction was made that the approximation of the Granato-Lücke formula, which describes the behavior of high-frequency asymptotes for irradiated samples, should also work for experiments with a variable impurity composition of the studied crystals. A comparison of the obtained Δd(f)dependences on pure KCl and KCl + Ba crystals (10 – 2 wt. %) was made, and the predicted effect of high-frequency asymptotes merging into a solid line in experiments on crystals with variable impurity composition is proved. It is proved that the approximation of the formula of the Granato-Lücke theory describes the anomalous behavior of the high-frequency asymptotes of the Δd(f) curves for experiments with a variable concentration of any weak stoppers of the Friedel type. |
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