Phenomenological model of changes in the speed of a sound wave in crystals caused by dopants

• Autorzy: Błachowicz T.
• Języki publikacji: EN

Abstrakty

EN

The paper examines theoretically changes in the speed of an acoustic wave in crystals caused by metallic dopants. It is well known that an acoustic wave has a wavelength larger than the typical dimension of the elementary crystallographic cell, so it is sensitive only to large-scale features. The model bases on the assumption that a crystal with uniform distributed dopants can be transformed into a multiplayer virtual structure form which some conclusions can be drawn. The approach presented is valid for longitudinal acoustic waves, where the atomic displacement can be considered as a continuum field. It provides positive or negative changes in the acoustic wave speeds for different dopants in a hypothetical lithium niobate crystal.

Słowa kluczowe

EN

elastic constants; elastic waves in layered media; superlattices; lithium niobate; dopants in lithium niobate; Rytov's model; pulse-echo method; ultrasonics

• Wydawca: Instytut Podstawowych Problemów Techniki PAN ; Komitet Akustyki PAN ; Polskie Towarzystwo Akustyczne
• Czasopismo: Archives of Acoustics
• Rocznik: 2004
• Tom: Vol. 29, no. 3
• Strony: 447--459
• Opis fizyczny: Bibliogr. 12 poz., rys., tab., wykr.

Twórcy

autor

Błachowicz T.

• Silesian University of Technology, Institute of Physics, Krzywoustego 2, 44-100 Gliwice, Poland,

Bibliografia

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