Photoacoustic properties of single crystal PbTe(Ni)

• Main Authors: Luković D., Nikolić P.M., Vujatović S., Savić S., Urošević D.
• Format: Article
• Language: English
• Published: International Institute for the Science of Sintering, Beograd 2007-01-01
• Series: Science of Sintering
• Subjects: photoacoustic method; thermal diffusivity; minority free carrier mobility
• Online Access: http://www.doiserbia.nb.rs/img/doi/0350-820X/2007/0350-820X0702161L.pdf

Single crystals of PbTe(Ni) were investigated by the photoacoustic method. They were produced using the Bridgeman method. These crystals have a sodium chloride cubic lattice and could be cleaved paralel to the plane orientation (200). They were of the n-type. Phase and amplitude photoacoustic spectra were measured using a transmision detection configuration set-up. Photoacoustic (PA) spectra (single and normalized) were numerically analyzed using the Rosencwaig-Gersho model. Thermal diffusivity and some electron-transport parameters were determined. These results were compared with existing results for pure single crystal PbTe. Thermal difusivity of PbTe(Ni) is a bit higher than the thermal difusivity of pure PbTe. This is the consequence of a decreasing concentration of the majority free carriers in the doped alloy. .