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Growth of pseudomorphic body centered tetragonal Mn films with an abrupt interface on Ag(001)

Growth of pseudomorphic body centered tetragonal Mn films with an abrupt interface on Ag(001)

Authors :
Marie-Christine Hanf
G. Gewinner
C. Krembel
Philippe Schieffer
Source :
Surface Science. :318-321
Publication Year :
1998
Publisher :
Elsevier BV, 1998.

Abstract

Mn films with a thickness of 2–15 monolayers (ML) have been deposited, in ultra-high vacuum, on a Ag(001) single crystal and analyzed by low energy electron diffraction (LEED) and X-ray photoelectron diffraction (XPD). When a 12 ML film is deposited at room temperature (RT), a ∼3 ML-thick diffuse interface is formed, and Ag segregation occurs on top of an epitaxial body centered tetragonal (bct) Mn layer. If the same amount of Mn is deposited at 80 K in order to block interdiffusion, the film grows in a polycrystalline α-Mn phase. Annealing the sample at 300 K does not markedly change its structure. However, when a 3 ML template of Mn is first deposited on the substrate kept at 80 K, and then 9 ML at 300 K, the data show that the film is pseudomorphic and adopts an epitaxial bct phase, and that the system exhibits an abrupt interface.

Details

ISSN :
00396028
Database :
OpenAIRE
Journal :
Surface Science
Accession number :
edsair.doi...........f3544d8d456a96dbcd2753812b12054e
Full Text :
https://doi.org/10.1016/s0039-6028(97)01062-5