Solid State Physics

Pramana

, Volume 17, Issue 1, pp 33-38

Behaviour of ultrasonic velocities in amorphous Se90Ge10 and Se85Ge15 alloys near their glass transition

  • P E S KarthaAffiliated withDepartment of Physics, Indian Institute of Science
  • , V C PadakiAffiliated withDepartment of Physics, Indian Institute of Science
  • , S T LakshmikumarAffiliated withDepartment of Physics, Indian Institute of Science
  • , E S R GopalAffiliated withDepartment of Physics, Indian Institute of Science

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Abstract

Precise measurements of 10 MHz frequency longitudinal and shear wave velocities are reported in amorphous SeGe alloys near their glass transition temperature T g . There is a sharp decrease of the velocities near T g , but the reduction in velocities appears smaller than expected.

Keywords

Chalcogenides glass transition ultrasonic velocities