Ramesh, K. ; Prashantha, M. ; Gopal, E. S. R. ; Koteeswara Reddy, N. (2009) Thermal anomalies in ternary Ge42-xPbxSe58 glasses near the charge carrier reversal threshold Journal of Applied Physics, 106 (11). p. 113516. ISSN 0021-8979
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Official URL: http://jap.aip.org/resource/1/japiau/v106/i11/p113...
Related URL: http://dx.doi.org/10.1063/1.3264947
Abstract
The carrier type reversal (CTR) from p- to n-type in semiconducting chalcogenide glasses is an important and a long standing problem in glass science. Ge-Se glasses exhibit CTR when the metallic elements Bi and Pb are added. For example, bulk Ge42-xSe58Pbx glasses exhibit CTR around 8-9 at.% of Pb. These glasses have been prepared by melt quenching method. Glass transition temperature (Tg), Specific heat change between the liquid and the glassy states (Δ Cp) at Tg and the nonreversing heat flow (ΔHnr) measured by modulated differential scanning calorimetry exhibit anomalies at 9 at.% of Pb. These observed anomalies are interpreted on the basis of the nano scale phase separation occurring in these glasses.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Chalcogenide Glasses; Differential Scanning Calorimetry; Enthalpy; Germanium Compounds; Glass Transition; Lead Compounds; Phase Separation; Selenium Compounds; Specific Heat; Vitreous State |
| ID Code: | 71119 |
| Deposited On: | 25 Nov 2011 13:05 |
| Last Modified: | 25 Nov 2011 13:05 |
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