一些过渡金属与GaAs反应的热稳定性

本文利用Miedema半经验模型计算了Pd,Pt,Ni,Ir,Rh,Co,Ti,Cr,V,Zr与GaAs反应的最终产物的形成焓,从而计算了这些反应以及最终产物中含As相的分解反应的自由能。结合对实验结果的分析得出:对于大部分上述金属与GaAs组成的体系,可以用反应自由能来评估最终产物的形成温度和含As的最终产物的稳定性。 关键词：

THERMAL STABILITY OF REACTIONS OF TRANSITION METALS WITH GaAa

In this paper, the formation enthalpies of the final phases presented in annealed contacts composed of transition metals (Pd, Pt, Ni, Ir, Rh, Co, Ti, Cr, V, Zr) and GaAs are calculated by using Miedema's semi-empirical model. Furthermore, the free energies of reaction both for the formations of the final phases and for the decompositions of the final phases containing As are calculated. These calculated results are compared with the experimental values. We reach the conclusion that for most of the above systems, the free energies of reaction can be adopted to assess the formation temperatures and the stabilities for the final phases.