1. Introduction Thermal oxidation of silicon monocrystalis a very important process in fabricationof metal--oxide--semiconductor (MOS) devices.In recent years i
We have studied the Mossbauer effect ofYBa<sub>2</sub>Cu<sub>2.88</sub>Fe<sub>0.12</sub>O<sub>7-x</sub> superconductive oxide from78 to 273K. Two minima of reco