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Determination of Mg composition in MgₓZn₁ˍₓO alloy: Validity of Vegard’s law

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dc.contributor.authorAshrafi, A. B. M. Almamun
dc.contributor.authorSegawa, Yusaburo
dc.date.accessioned2015-11-05T01:16:53Z
dc.date.available2015-11-05T01:16:53Z
dc.date.issued2005-09-14
dc.description.abstractVegard’s law and inductively coupled plasma atomic emission spectrometry were employed to determine the Mg composition in MgₓZn₁ˍₓO layers deposited on 6H–SiC substrates. With the increase of Mg composition in MgₓZn₁ˍₓO layers, the c-axis length decreased by 5.2048−0.072x, while the a-axis length increased to 3.2491+0.047x. The lattice constants estimated by Vegard’s law and a theoretical model exhibited an uncertainty of ∼3% that has been attributed to the ∼2% lattice misfit in the MgO∕ZnO materials system. Localized exciton peaks of MgₓZn₁ˍₓO alloy in photoluminescence(PL) measurements disappeared completely, while the neutral donor-acceptor pair and 1-longitudinal optical-phonon energies decreased rapidly with the increase of Mg composition. These PL data do not comply with Vegard’s law. The asymmetric behavior in the MgₓZn₁ˍₓO alloy is the subject of locally disordered Mg potential fluctuations and an artifact of the cMgO and aMgO lengths calculated theoretically.en_AU
dc.description.sponsorshipThis work was supported in part by the Special Postdoctoral Research Fellowship Program, Photodynamics Research Center, The Institute of Physical and Chemical Research RIKEN, Japan.en_AU
dc.identifier.issn1071-1023en_AU
dc.identifier.urihttp://hdl.handle.net/1885/16364
dc.publisherAmerican Institute of Physics (AIP)en_AU
dc.rightshttp://www.sherpa.ac.uk/romeo/issn/1071-1023..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 5/11/15). Copyright 2005 American Vacuum Society. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Vacuum Science & Technology B and may be found at https://doi.org/10.1116/1.2050653en_AU
dc.sourceJournal of Vacuum Science & Technology B: Microelectronics and Nanometer Structuresen_AU
dc.titleDetermination of Mg composition in MgₓZn₁ˍₓO alloy: Validity of Vegard’s lawen_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.issue5en_AU
local.bibliographicCitation.lastpage2033en_AU
local.bibliographicCitation.startpage2030en_AU
local.contributor.affiliationAshrafi, Abm (Almamun), College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Department of Electronic Materials Engineering, The Australian National Universityen_AU
local.contributor.affiliationSegawa, Y, RIKEN, Japanen_AU
local.contributor.authoruidu3915966en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor100799en_AU
local.identifier.absfor091299en_AU
local.identifier.absfor020501en_AU
local.identifier.ariespublicationU4047546xPUB87en_AU
local.identifier.citationvolume23en_AU
local.identifier.doi10.1116/1.2050653en_AU
local.identifier.essn1520-8567en_AU
local.publisher.urlhttp://www.avs.org/en_AU
local.type.statusPublished Versionen_AU

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