Next, we checked the microstructure of the films using XRD, as shown in Fig. 2. The as-deposited sample displays several small peaks, the positions of which match with those of (0 15) and (1 0 10) planes of the BizTe phase, respectively.
After annealing at elevated temperatures, the XRD graph displays the emergence of some new peaks.
For the sample annealed at 100 oc for 8 h, three small peaks appear around 17.5. 44.5 and 54.1 the peak positions corresponding to (006) (0015) and (0018) planes of BizTe3.