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Nanoscale precipitation patterns in carbon-nickel nanocomposite thin films: Period and tilt control via ion energy and deposition angle
Forschungszentrum Dresden Rossendotf.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Forschungszentrum Dresden Rossendotf.
Forschungszentrum Dresden Rossendotf.
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2010 (English)In: JOURNAL OF APPLIED PHYSICS, ISSN 0021-8979, Vol. 108, no 4, 043503- p.Article in journal (Refereed) Published
Abstract [en]

Periodic precipitation patterns in C:Ni nanocomposites grown by energetic ion codeposition are investigated. Films were grown at room temperature by ionized physical vapor deposition using a pulsed filtered cathodic vacuum arc. We reveal the role of the film composition, ion energy and incidence angle on the film morphology using transmission electron microscopy and grazing incidence small angle x-ray scattering. Under these growth conditions, phase separation occurs in a thin surface layer which has a high atomic mobility due to energetic ion impacts. This layer is an advancing reaction front, which switches to an oscillatory mode, producing periodic precipitation patterns. Our results show that the ion induced atomic mobility is not random, as it would be in the case of thermal diffusion but conserves to a large extent the initial direction of the incoming ions. This results in a tilted pattern under oblique ion incidence. A dependence of the nanopattern periodicity and tilt on the growth parameters is established and pattern morphology control via ion velocity is demonstrated.

Place, publisher, year, edition, pages
American Institute of Physics , 2010. Vol. 108, no 4, 043503- p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-60235DOI: 10.1063/1.3467521ISI: 000281857100034OAI: oai:DiVA.org:liu-60235DiVA: diva2:355860
Note
Original Publication: Gintautas Abrasonis, Thomas Oates, Gyoergy J Kovacs, Joerg Grenzer, Per Persson, Karl-Heinz H Heinig, Andrius Martinavicius, Nicole Jeutter, Carsten Baehtz, Mark Tucker, Marcela M M Bilek and Wolfhard Moeller, Nanoscale precipitation patterns in carbon-nickel nanocomposite thin films: Period and tilt control via ion energy and deposition angle, 2010, JOURNAL OF APPLIED PHYSICS, (108), 4, 043503. http://dx.doi.org/10.1063/1.3467521 Copyright: American Institute of Physics http://www.aip.org/ Available from: 2010-10-08 Created: 2010-10-08 Last updated: 2015-03-09

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