The Intermediate Phase in Ternary GexAsxSe1–2x Glasses

The Intermediate Phase in Ternary GexAsxSe1-2x Glasses

Melt-quenched AsxGexSe1-2x glasses over the composition range, 0 < x < 0.26, are examined in Raman scattering, T-modulated Differential Scanning Calorimetry (MDSC), and Sn Mossbauer spectroscopy measurements. The non-reversing enthalpy near Tg, ∆Hnr(x), accessed from MDSC shows a global minimum (~ 0) in the xc(1) = 0.09 < x < xc(2) = 0.16 range, and increases by an order of magnitude both at x ...

An intermediate phase in GexSe1−x glasses: experiment and simulation

The pair correlation function for GexSe1−x alloys near the intermediate phase (IP) is reported. First-principles MD models of these alloys show a ‘selforganized’ phase associated with the number of Ge bonds with twofold Se atoms. This probably represents the IP of Boolchand. The self-organization involves maintaining a nearly constant number of twofold Se atoms bonded to one Ge atom through a r...

Glass structure , rigidity transitions and the intermediate phase in the Ge - As - Se ternary

– The non-reversing heat flow, ∆Hnr(x) near Tg in ternary GexAsxSe1−2x glasses is examined by temperature-modulated differential scanning calorimetry. The ∆Hnr(x) term shows a deep minimum (which is almost zero) in the 0.09 < x < 0.14 range, identified with the intermediate phase, and an increase, both at low x (< 0.09) in the floppy phase and at high x (> 0.14) in the stressed rigid phase. Exp...

The thermally reversing window in ternary GexPxS1−2x glasses

Gex Px S1−2x glasses in the compositional range 0.05 x 0.19 have been synthesized and examined in temperature modulated differential scanning calorimetry (MDSC) and Raman scattering experiments. Trends in the nonreversing enthalpy Hnr(x) near Tg show the term to almost vanish in the 0.090(5) < x < 0.135(5) range, and to increase by an order of magnitude at x < 0.09, and at x > 0.135. In analogy...

Competing stoichiometric phases and the intermediate phase in Ge xSe 1−x glasses