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dc.contributor.advisorKimball, Clyde W.en_US
dc.contributor.authorLee, Hsunen_US
dc.date.accessioned2016-04-08T13:22:11Z
dc.date.available2016-04-08T13:22:11Z
dc.date.issued1988
dc.identifier.urihttp://commons.lib.niu.edu/handle/10843/16073
dc.descriptionBibliography: pages [39]-41.en_US
dc.description.abstract⁵⁷Fe Mossbauer effect measurements have been performed at room temperature on Y(Ba₁-ₓSrₓ)₂(Cu₀.₉₉Fe₀.₀₁)₃O[sub y] with x from 0 to 1. In all samples, four quadrupole splittings, corresponding to iron atoms in different local sites, are observed. The Mossbauer spectra for low Sr concentrations resemble those for 1% Fe doping in the high temperature orthorhombic oxide, YBa₂(Cu₀.₉₉Feo.01₀.₀₁)₃O₇ The experimental neutron diffraction results show that iron atoms substitute principally into the Cul site or an interstitial site near Cul in YBa₂ (Cu₁-ₓFeₓ)₃O₇. The strontium ion is smaller than the barium ion so that a lattice distortion, or defects, may occur and additional oxygen vacancies may be introduced. This would lead to the depression of T[sub c] in the Y(Ba₁-ₓSrₓ)₂(Cu₀.₉₉Fe₀.₀₁)₃O[sub y] series.en_US
dc.format.extentvii, 41 pagesen_US
dc.language.isoengen_US
dc.publisherNorthern Illinois Universityen_US
dc.rightsNIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.en_US
dc.subject.lcshSuperconductorsen_US
dc.subject.lcshSuperconductivityen_US
dc.subject.lcshMössbauer spectroscopyen_US
dc.titleMossbauer study of the oxygen order and superconductivity in Y(Ba₁-ₓSrₓ)₂(Cu₀.₉₉Fe₀.₀₁)₃Oyen_US
dc.type.genreDissertation/Thesisen_US
dc.typeTexten_US
dc.contributor.departmentDepartment of Physicsen_US
dc.description.degreeM.S. (Master of Science)en_US


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