Growth morphology of epitaxial Fe films on annealed MgO (001) surfaces

Citation
A. Subagyo et al., Growth morphology of epitaxial Fe films on annealed MgO (001) surfaces, IEEE MAGNET, 35(5), 1999, pp. 3037-3039
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON MAGNETICS
ISSN journal
00189464 → ACNP
Volume
35
Issue
5
Year of publication
1999
Part
1
Pages
3037 - 3039
Database
ISI
SICI code
0018-9464(199909)35:5<3037:GMOEFF>2.0.ZU;2-N
Abstract
The effects of substrate annealing on the growth morphology of bcc-Fe(001) films epitaxially grown on MgO (001) surfaces have been investigated. Subst rate annealing at 1000 degrees C for 30 minutes produced step-terrace surfa ces which are the basis of flat and square Fe islands. By increasing the an nealing time, the step profiles are improved to form long straight steps. L onger annealing time caused an increase of segregated impurities regions an d a reconstruction of the MgO surface. The presence of the segregated impur ities and the reconstructed MgO surface negate the annealing effects, i.e. it reduces the step edge growth that enhances the formation of round island s, degrades the uniformity of Fe island size and increases the rms roughnes s of Fe films.