Abstract
The thermal spectrum of thedc conductivity of Te81Ge15As4 during a consecutive heatingcooling cycle within the temperature rangeT g > T> T m indicated that the heating and cooling parts of the cycle do not coincide and phase transformation were ohserved The activation energies of conduction (δE) for the initial amorphous, the liquid and the final crystallized phases are 0.35, 0.30 and 0.16 eV, respectively. The growth of conductive regions during isothermal annealing of the amorphous solid phase was studied and correlated to the corresponding structural changes recorded by using microphotography and X-ray diffraction. The structure of the investigated three-component composition can be represented as a solid solution based on tellurium character. A value of 2.4 eV was obtained for the activation energy of crystallization from non-isothermal transition data.
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