The effect of changes in the ultrasonic frequency or in the dislocation structure of the samples on the parameters of the low-temperature α peak of the internal friction and the Young’s modulus defect corresponding to it is investigated experimentally in single crystals of pure iron. A statistical interpretation of the temperature dependence and structural sensitivity of the characteristics of the dynamic relaxation in the neighborhood of the α peak is proposed, based on the assumption of a random scatter of the values of the activation energy of the elementary relaxators. Empirical estimates are obtained for the attempt period and for the mean value and variance of the activation energy of the relaxation process responsible for the α peak of the internal friction in iron.
Statistical analysis of the low-temperature α peak of the internal friction in iron single crystals
V. D. Natsik, P. P. Pal-Val, L. N. Pal-Val, Yu. A. Semerenko; Statistical analysis of the low-temperature α peak of the internal friction in iron single crystals. Low Temp. Phys. 1 July 2000; 26 (7): 522–528. https://doi.org/10.1063/1.1306411
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