STUDY OF GLASS-TRANSITION IN MN-DOPED GE15TE85 GLASS BY ELECTRON-SPIN-RESONANCE

The glass transition of the Mn-doped Ge15Te85 chalcogenide glass has b een investigated during nonisothermal, rate-scan heating by electron s pin resonance. The glass exhibits two characteristic signals centered at g = 2.00 and 4.3 which were recorded during heating from room tempe rature to a temperature above the glass transition but below the cryst allization temperature of the glass. No significant change in the line width of either of the resonance lines occurs from room temperature up to near the glass transition temperature. However, the linewidth of t he g = 2.00 line begins to decrease and that of the g = 4.3 line start s to increase around the glass transition temperature. The mechanisms of these narrowing and broadening phenomena of the spectra observed in the supercooled liquid state are discussed.