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dc.contributor.advisorGuloy, Arnold M.
dc.creatorAryal, Lekh Raj 1981-
dc.date.accessioned2016-02-21T03:04:03Z
dc.date.available2016-02-21T03:04:03Z
dc.date.createdDecember 2013
dc.date.issued2013-12
dc.identifier.urihttp://hdl.handle.net/10657/1237
dc.description.abstractThis research was motivated by the variety of electronic and magnetic properties that ternary intermetallic compounds, AT2X2 (A= alkali/alkaline earth metals, T = transition metal and X = post-transition metal) exhibit. These polar intermetallics crystallize in the ubiquitous ThCr2Si2 structure type (space group I4/mmm) or derivatives of it. In this context, the ternary cobalt germanides: CaCo2Ge2 and SrCo2Ge2, and arsenides: KCo2As2 and BaCo2As2, were synthesized and characterized. The ternary cobalt germanides were prepared from the elements by arc melting techniques, and characterized by means of single crystal and powder X-ray diffraction. The ternary arsenides were synthesized from the high-temperature reactions of the respective active metals (K, Ba) with pre-reacted binary CoAs within welded Nb containers. The ternary arsenides were characterized by means of powder X-ray diffraction. The magnetic susceptibility of these compounds was measured. CaCo2Ge2 and KCo2As2 were found to be weakly ferromagnetic while BaCo2As2 was pauli-paramagnetic. Finally, the solid solubility of BaCo2As2 and KCo2As2, to prepare Ba(x)K(1-x)Co2As2, was investigated by the powder X-ray diffraction. The crystal chemistry and the physical properties of the ternary compounds are discussed.
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectIntermetallics
dc.subjectPauli-paramagnetic
dc.subjectFerromagnetic
dc.titleSynthesis, Structure and Some Properties of ThCr2Si2 Type Compounds: AeCo2Ge2 (Ae=Ca,Sr) and ACo2As2(A=K,Ba)
dc.date.updated2016-02-21T03:04:03Z
dc.type.genreThesis
thesis.degree.nameMaster of Science
thesis.degree.levelMasters
thesis.degree.disciplineChemistry
thesis.degree.grantorUniversity of Houston
thesis.degree.departmentChemistry, Department of
dc.contributor.committeeMemberJacobson, Allan J.
dc.contributor.committeeMemberYang, Ding-Shyue
dc.contributor.committeeMemberLitvinchuk, Alexander P.
dc.type.dcmiText
dc.format.digitalOriginborn digital
dc.description.departmentChemistry, Department of
thesis.degree.collegeCollege of Natural Sciences and Mathematics


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