Influence of layer microstructure on the double nucleation process in Cu/Mg multilayers

M. Gonzalez-Silveira, J. Rodriguez-Viejo, G. Garcia, F. Pi, F. J. Ager, J. Lábár, A. Barna, M. Menyhárd, L. Kótis

Research output: Contribution to journalArticle

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Abstract

We have investigated by differential scanning calorimetry the thermal evolution of CuMg multilayers with different modulation lengths, ranging from 728 to 30120 nm. The Cu and Mg layers were grown by sequential evaporation in an electron beam deposition system. The phase identification and layer microstructure were determined by cross-section transmission electron microscopy, Rutherford backscattering, and scanning electron microscopy with focused ion beam for sample preparation. Upon heating, the intermetallic Cu Mg2 forms at the interfaces until coalescence is reached and thickens through a diffusion-limited process. Cross-section transmission electron microscopy observations show a distinct microstructure at the top and bottom of the as-prepared Mg layers, while no significant differences were seen in the Cu layers. We show that this effect is responsible for the observed asymmetry in the nucleation process between the Cu on Mg and the Mg on Cu interfaces. By modeling the calorimetric data we determine the role of both interfaces in the nucleation and lateral growth stages. We also show that vertical growth proceeds by grain development of the product phase, increasing significantly the roughness of the interfaces.

Original languageEnglish
Article number113522
JournalJournal of Applied Physics
Volume100
Issue number11
DOIs
Publication statusPublished - 2006

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nucleation
microstructure
transmission electron microscopy
cross sections
coalescing
intermetallics
backscattering
roughness
heat measurement
ion beams
asymmetry
evaporation
electron beams
modulation
preparation
scanning electron microscopy
heating
scanning
products

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Cite this

Gonzalez-Silveira, M., Rodriguez-Viejo, J., Garcia, G., Pi, F., Ager, F. J., Lábár, J., ... Kótis, L. (2006). Influence of layer microstructure on the double nucleation process in Cu/Mg multilayers. Journal of Applied Physics, 100(11), [113522]. https://doi.org/10.1063/1.2398001

Influence of layer microstructure on the double nucleation process in Cu/Mg multilayers. / Gonzalez-Silveira, M.; Rodriguez-Viejo, J.; Garcia, G.; Pi, F.; Ager, F. J.; Lábár, J.; Barna, A.; Menyhárd, M.; Kótis, L.

In: Journal of Applied Physics, Vol. 100, No. 11, 113522, 2006.

Research output: Contribution to journalArticle

Gonzalez-Silveira, M. ; Rodriguez-Viejo, J. ; Garcia, G. ; Pi, F. ; Ager, F. J. ; Lábár, J. ; Barna, A. ; Menyhárd, M. ; Kótis, L. / Influence of layer microstructure on the double nucleation process in Cu/Mg multilayers. In: Journal of Applied Physics. 2006 ; Vol. 100, No. 11.
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