Accession Number : AD0724328

Title :   Ultrasonic Attenuation in Germanium at Room Temperature.

Descriptive Note : Technical rept.,

Corporate Author : ILLINOIS UNIV URBANA DEPT OF METALLURGY AND MINING ENGINEERING

Personal Author(s) : Mattas,Richard F. ; Birnbaum,Howard K.

Report Date : JUN 1971

Pagination or Media Count : 44

Abstract : The effect of dislocations on the acoustic attenuation of n, p and intrinsic germanium was determined at 300K. The frequency range studied was 30 to 310 MHz. In the undeformed germanium tthe attenuation was explained by an Akheizer mechanism. Introduction of dislocations resulted in a small increase of attenuation which increased with frequency and did not depend on the doping level of the germanium. The increase in attenuation was compared with various mechanisms; kink motion along dislocations, the vibrating string model, and phonon scattering from the dislocations. (Author)

Descriptors :   (*GERMANIUM, DISLOCATIONS), (*ULTRASONIC RADIATION, ATTENUATION), SINGLE CRYSTALS, DEFORMATION, PHONONS, DAMPING

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE