EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE INVESTIGATION OF SHORT-RANGE ORDER IN A-GE1-XSNX ALLOYS

dc.creatorPASCARELLI, S
dc.creatorBOSCHERINI, F
dc.creatorMOBILIO, S
dc.creatorZANATTA, AR
dc.creatorMARQUES, FC
dc.creatorCHAMBOULEYRON, I
dc.date1992
dc.dateSEP 15
dc.date2014-12-16T11:37:11Z
dc.date2015-11-26T16:26:10Z
dc.date2014-12-16T11:37:11Z
dc.date2015-11-26T16:26:10Z
dc.date.accessioned2018-03-28T23:06:55Z
dc.date.available2018-03-28T23:06:55Z
dc.identifierPhysical Review B. American Physical Soc, v. 46, n. 11, n. 6718, n. 6723, 1992.
dc.identifier0163-1829
dc.identifierWOS:A1992JN82600006
dc.identifier10.1103/PhysRevB.46.6718
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/66528
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/66528
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/66528
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1268811
dc.descriptionThe local environments of germanium and tin atoms in a-Ge1-xSnx alloys (0.0 less-than-or-equal-to x less-than-or-equal-to 0.2) have been investigated by measuring the extended x-ray-absorption fine structure (EXAFS) at the Ge K edge and at the Sn L(III) edge. The measured EXAFS at both edges could be described only by assuming the presence of a mixed first coordination shell composed of both Ge and Sn atoms. Coordination numbers, bond lengths, and relative mean-square displacement values characterizing the first coordination shell around Ge and Sn atoms were obtained. It has been found that the Sn atoms are randomly distributed in the amorphous Ge network, and that metallic Sn segregation may be excluded throughout the concentration range studied. The Ge-Ge, Ge-Sn, and Sn-Sn distances were found to be independent of concentration and equal to 2.47, 2.67, and 2.80 angstrom, respectively. The random atomic arrangement observed is an indication that, in this concentration range and under the growth conditions adopted, the incorporation of Sn in the amorphous Ge matrix is dominated by chemical interactions, regardless of the atomic-size difference between the two atoms.
dc.description46
dc.description11
dc.description6718
dc.description6723
dc.languageen
dc.publisherAmerican Physical Soc
dc.publisherCollege Pk
dc.publisherEUA
dc.relationPhysical Review B
dc.relationPhys. Rev. B
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectStructure Spectroscopy
dc.subjectAbinitio Calculations
dc.subjectPhase Functions
dc.subjectMossbauer
dc.subjectAmplitude
dc.titleEXTENDED X-RAY-ABSORPTION FINE-STRUCTURE INVESTIGATION OF SHORT-RANGE ORDER IN A-GE1-XSNX ALLOYS
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución