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Origin of Periodic Fluctuations with Temperature of Ultrasonic Attenuation in zinC, Aluminium, and Iron
Author(s) -
Youssef Moheb H.,
Roushdy M.,
Gobran N. K.
Publication year - 1989
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221550214
Subject(s) - attenuation , aluminium , zinc , ultrasonic attenuation , ultrasonic sensor , nickel , materials science , work (physics) , thermal , vibration , thermodynamics , metallurgy , physics , optics , acoustics
Abstract The ultrasonic attenuation—temperature curves for zinc, aluminium, and iron are found to comprise a periodic fluctuation of the attenuation with temperature as measured at 2, 4, and 8 MHz. This fluctuation is superposed on the well‐known types of ultrasonic damping in metals. The periodicity of such fluctuations is explained in terms of successive thermal levels of atomic vibrations. This approach affords successfully the visualization of the responsible pair of levels which effectively predominates along a certain interval of temperature and furnishes a lossive two‐state model. The successive models are also supported by a previous work on nickel.