Simultaneous determination of the thermal diffusivity and a drum factor for CdBeMnTe crystals with the photoacoustic method

• Photoacoustic characteristics of CdTe and Cd1−x−yBexMnyTe crystals have been shown.
• Thermal diffusivity and the drum factor have been determined simultaneously.
• Increase of Be resulted in the decrease of the value of the thermal diffusivity.
• The strong increase of the drum factor B was observed with an increase of Be content.

The paper presents results of photoacoustic studies of the thermal diffusivity of CdTe and Cd1−x−yBexMnyTe crystals. The drum effect strongly influences the photoacoustic characteristics that have been measured. The values of the thermal diffusivity of the crystals have been extracted from the amplitude and phase frequency characteristics measured in reflection and transmission configurations in the Sf/Sr and Phase-Lag method. This paper presents that it is possible to extract simultaneously the thermal diffusivity and a drum factor B from photoacoustic frequency measurements.