Figure 4
From: Dependence of Solidification for Bi2Te3−xSex Alloys on Their Liquid States
Solidification microstructures as observed by optical microscopy along the radial direction of the cylindrical ingot for both A-group (upper row) and B-group (lower row) samples. (a) Bi2Te2.7Se0.3-A; (b) Bi2Te2.7Se0.3-B; (c) Bi2Te2.55Se0.45-A; (d) Bi2Te2.55Se0.45-B; (e) Bi2Te2.4Se0.6-A; (f) Bi2Te2.4Se0.6-B.
