Thermal diffusivity of single crystal Bi0.9Sb0.1

Abstract

A single crystal Bi0.9Sb0.1 ingot was synthesized using the Bridgman technique. Thermal diffusivity and electronic transport properties of single crystal cleaved plates (00l) were determined from PA photoacoustic phase and amplitude spectra obtained using the photoacoustic method with a transmission detection configuration. Both the PA phase and amplitude were measured versus the modulation frequency and numerically analyzed. EDS analyses done to determine chemical composition of the studied samples as well as to check sample homogeneity. Hall effect measurements data were used for the photoacustic measurements.

Monokristalni ingot Bi0.9Sb0.1 sastava je sisntetisan Brižmanovom tehnikom. Toplotna difuzivnost i elektronske transportne osobine pločice monokrisatala sečene paralelno plosni (00l) određene su iz fotoakustičnih (PA) spektara amplituda i faza primenom metoda fotoakustike za transmisionu detekciju. PA faze i amplitude merene su sa promenom modulacione frekvencije i numerički analizirane. Mikrohemijskom elektronskom analizom EDS metodom određen je hemijski sastav i homogenost uzoraka. Podaci merenja holovog efekta korišćeni su kao polazni parametri za utačnjavanje fotoakustičnih dijagrama.