الفهرس | Only 14 pages are availabe for public view |
Abstract three chalcogenide glasses of Ge20 Se12 TeGS’ Ge 2 7 Sell Te62 and Gel~ Te75 InlO have been prapered by q~enching their melts from abo~t 1000 00 in ice water • Rectang~ar discs of 2 x 2 x 1 mmJ dimensions are s~bjected to electrical cond~ctivity meas~rements • It is fomd that the mentioned systems behave the normal semicond~ctors behavio~ with activation energies of abo~t 0.5 eVe The effect of thermal annealing on the both cond~ctivity and the activation energy is st~died to follow up the effect of aging on the stability of these systems • It is fomd in general that tb,econd~ctivity increases with annealing time • Besides, the activation energies decrease with annealing time • This is s~ested to be d~e to the n~cleation and growth process. This res- ~lt are confirmed with X-ray analysis. In the other hand, I-V charact.eristics . showed memory switching phenomena. The switching process is interpreted according to the electrothermal model. |