Dynamic relaxation of the elastic properties of hard carbon films

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Hirvonen, J.-P.
dc.contributor.author Koskinen, J.
dc.contributor.author Kaukonen, M.
dc.contributor.author Nieminen, Risto M.
dc.contributor.author Scheibe, H.-J.
dc.date.accessioned 2015-07-27T09:01:13Z
dc.date.available 2015-07-27T09:01:13Z
dc.date.issued 1997
dc.identifier.citation Hirvonen, J.-P. & Koskinen, J. & Kaukonen, M. & Nieminen, Risto M. & Scheibe, H.-J. 1997. Dynamic relaxation of the elastic properties of hard carbon films. Journal of Applied Physics. Volume 81, Issue 11. 7248-7254. ISSN 0021-8979 (printed). DOI: 10.1063/1.365322. en
dc.identifier.issn 0021-8979 (printed)
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/17254
dc.description.abstract The effect of enhanced atomic mobility on the growth of hard carbon films was examined. Tetrahedrally bonded amorphous carbon films were deposited by condensing energetic carbon ions using an arc-discharge deposition method. The deposition temperature varied between 50 and 400 °C. The dependence of elastic properties on deposition temperature was examined by determining the frequency-dependent propagation velocity of ultrasonic surface acoustic waves induced by a laser. A remarkable decrease in elastic coefficient was revealed above the deposition temperature of 300 °C and complete relaxation was obtained at 400 °C. This observation was analyzed by using a simple model which was in turn supported by molecular dynamics simulations. The relaxation turns out to be a thermally activated, dynamic process with an activation energy of 0.57 eV. Possible relaxation mechanisms associated with the migration of atoms or defects on a growing surface are discussed. en
dc.format.extent 7248-7254
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher AIP Publishing en
dc.relation.ispartofseries Journal of Applied Physics en
dc.relation.ispartofseries Volume 81, Issue 11
dc.rights © 1997 American Institute of Physics. This is the accepted version of the following article: Hirvonen, J.-P. & Koskinen, J. & Kaukonen, M. & Nieminen, Risto M. & Scheibe, H.-J. 1997. Dynamic relaxation of the elastic properties of hard carbon films. Journal of Applied Physics. Volume 81, Issue 11. 7248-7254. ISSN 0021-8979 (printed). DOI: 10.1063/1.365322, which has been published in final form at http://scitation.aip.org/content/aip/journal/jap/81/11/10.1063/1.365322. en
dc.subject.other Physics en
dc.title Dynamic relaxation of the elastic properties of hard carbon films en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.rights.holder American Institute of Physics
dc.contributor.school Perustieteiden korkeakoulu fi
dc.contributor.school School of Science en
dc.contributor.department Teknillisen fysiikan laitos fi
dc.contributor.department Department of Applied Physics en
dc.subject.keyword carbon films en
dc.subject.keyword tight-binding methods en
dc.subject.keyword elasticity en
dc.subject.keyword thin films en
dc.identifier.urn URN:NBN:fi:aalto-201507273883
dc.type.dcmitype text en
dc.identifier.doi 10.1063/1.365322
dc.type.version Final published version en


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