MOSSBAUER STUDY OF FE-PB FILMS PREPARED BY THERMAL EVAPORATION

Although several alloys from some immiscible elements such as Fe/Cu, F e/Ag have been obtained by vapour quenching techniques, so far there h ave been no reports on the Fe/Pb system. In this work, FexPb1-x films (x = 0.10, 0.12, 0.20, 0.40, 0.42, 0.50, 0.63 and 0.70) with a thickne ss of about 300 nm have been prepared at different deposition temperat ures (20, 200 and 300 K) by a thermal co-evaporation technique. The in situ Mossbauer measurements were performed to study the alloying proc ess, the magnetic properties and the structural variation with tempera ture. The results indicate that a solubility of 3% for Fe in Pb can be obtained by depositing an Fe diluted film (x = 0.10) at 20 K. For the highly Fe concentrated films, granular systems (Fe clusters) seem to be formed at all deposition temperatures.