Photoacoustic characterization of chalcogenide glasses: Thermal diffusivity ofGexTe1

Thermal diffusivity measurements on ternary Ge–Te–Tl glasses using Photo-thermal Deflection method: Effect of thallium addition

“…A maximum in the value of α has been observed at the rigidity threshold in many systems [12][13][14][15][16][17]. In systems exhibiting an intermediate phase, a maximum at the start of rigidity percolation and a minimum at the end of the intermediate phase, have been observed [18].…”

“…As stated earlier, the thermal diffusivity is able to pick up structural effects such as rigidity percolation threshold [12][13][14][15][16][17]19] and extended stiffness transitions [18]; a maximum in the composition dependence of α has been observed earlier at the rigidity percolation threshold. An inverse percolation threshold has also been observed in glasses containing halides [5] which have co-ordination of one.…”

Structural instability and photoacoustic study of AlSb prepared by mechanical alloying

“…After being heat filtered by a water lens, the light is mechanically chopped by a PerkinElmer chopper (model 197) and focused onto the sample. The sample is mounted directly onto the front sound inlet of an electret microphone [27]. The output voltage from the microphone is connected to a computer through a lock-in amplifier in order to record the amplitude and phase of the PAS signal as functions of the modulation frequency.…”

Structural and thermal study of nanostructured GaSb alloy prepared by mechanical alloying

“…Details about the OPC setup can be found in Refs. [27,28]. The samples for the OPC measurements were prepared by compressing at the same pressure the as-milled and annealed GaSb powders to form tiny circular pellets, 10 mm in diameter, with thickness of 520 and 500 m, respectively.…”