Reaction and deposition of laser-evaporated iron

Abstract

Reaction of laser-evaporated iron atom was investigated by Mössbauer spectroscopy and was applied for the production of films. Iron oxide films were produced by laser-deposition of Fe metal and hematite solid onto Al substrates, and the compositions of the films changed depending on the pressure of the O 2 atmosphere and the temperature of the substrates. The spin orientations of α-Fe films deposited by three types of deposition methods were compared. The nuclear spin of iron films produced by deposition of Fe atoms vaporized by resistive heating was perpendicular to the substrate surface, while that of films produced by laserdeposition of Fe was parallel to the substrate surface. The nuclear spins of iron films produced using an arc-plasma-gun were linear orientations along nanometer-sized grooves on the Al substrate surface.

Laser deposition of iron in oxygen atmosphere

“…Another important characteristic of laser evaporation is the generation of micrometer-sized particles, which are called 'droplets'. In previous studies [11], we investigated the effects of droplets on the deposited iron oxide films and found that droplets produce a α-Fe layer that is mixed with iron oxide layers and that the α-Fe layer did not react with the oxide in the films. In the present study, we perform PLD under conditions that suppress the production of large droplets.…”