Amorphous chalcogenides are attracted attention as electronic materials and interest us in their character, which have anomalous V-I characteristics in the non-equilibrium state. New fabrication method of the amorphous chalcogenides is required for controlling electronic properties. Mechano-chemical method (MC) is a process of inducing crystal-amorphous phase transition. In this process, the amount of amorphous phase can be determined by milling conditions. Furthermore, the materials, which are difficult to amorphize by rapid quench from liquid and gas state, can become amorphous by the MC. Therefore, this method has a great potential in developing new amorphous chalcogenides. However, studies of this process are not enough for application to new material design. We have fabricated amorphous Se by a planetary ball mill, and investigated the amorphization process of Se in the structural changing by using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The rate of the change of integral intensities of Bragg peaks under various milling conditions gives the relationship between impact energy and the amorphization rate.
展开▼
