The interface of laser-deposited Fe/Ag multilayers: evidence for the "subsurface growth mode" during pulsed-laser deposition and examination of the bcc-fcc transformation

Citation
S. Fahler et al., The interface of laser-deposited Fe/Ag multilayers: evidence for the "subsurface growth mode" during pulsed-laser deposition and examination of the bcc-fcc transformation, APPL PHYS A, 69, 1999, pp. S459-S462
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
ISSN journal
09478396 → ACNP
Volume
69
Year of publication
1999
Supplement
S
Pages
S459 - S462
Database
ISI
SICI code
0947-8396(199912)69:<S459:TIOLFM>2.0.ZU;2-8
Abstract
One of the most significant features of pulsed-laser deposition (PLD) in va cuum as compared to conventional deposition methods is that a significant n umber of ions are deposited with a high kinetic energy of about 100 eV. Usi ng Fe/Ag multilayers, we show that the deposition of energetic particles du ring PLD leads to implantation into the existing film. The film growth can be described by a growth mode in which the material does not grow on top, b ut rather within the topmost few monolayers of the already deposited film. To examine this "subsurface growth", in situ resistance measurements and el ectron diffraction experiments were performed. Resistance measurements show a drop in conductance after beginning a new Fe layer, an effect attributed to implantation and alloying at the interface. Electron diffraction experi ments allow the observation of the structural change from fcc-Ag to bcc-Fe and vice versa. These experiments are interpreted by the use of a Pain tran sformation to describe a homogeneous transformation between the two structu res.