Spectroscopic study of transition metal compounds

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dc.contributor.advisorapl. Prof. Dr. Manfred Neumann
dc.creatorDemeter, Mihaela Carmen
dc.date.accessioned2010-01-30T14:35:11Z
dc.date.available2010-01-30T14:35:11Z
dc.date.issued2001-05-17T15:17:56Z
dc.date.submitted2001-05-17T15:17:56Z
dc.identifier.urihttps://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2001051714-
dc.description.abstractIn the last few years a renewed interest has reappeared in materials that were highly investigated in the 50s-70s, like manganese perovskites, spinel chalcogenides and vanadium oxides. The first two classes of materials are nowadays intensively studied due to the colossal magnetoresistance effect, which is the magnetoresistance associated with a ferromagnetic-paramagnetic transition. Vanadium oxides are known to form many compounds and most of them undergo metal-to-insulator phase transitions, with a high increase in the electrical conductivity (MIT). Many technological applications derive from the variation of the physical properties around the phase transition temperature. Although many efforts have been done in order to understand their electronic structures and to elucidate the MIT mechanisms, the vanadium oxides are still matter of debate in science.The present study has been performed in order to understand the electronic structure of these very intriguing materials. The role of different dopants that induce strong changes in the electronic and magnetic properties has been investigated making use of two spectroscopic techniques, namely X-ray photoelectron and X-ray emission spectroscopy.eng
dc.language.isoeng
dc.subjectelectronic structure
dc.subjectMn-perovskites
dc.subjectCr-chalcogenide spinels
dc.subjectColossal magnetoresistance
dc.subjectvanadium oxides
dc.subjectXPS
dc.subjectXES
dc.subject.ddc530 - Physik
dc.titleSpectroscopic study of transition metal compoundseng
dc.typeDissertation oder Habilitation [doctoralThesis]-
thesis.locationOsnabrück-
thesis.institutionUniversität-
thesis.typeDissertation [thesis.doctoral]-
thesis.date2001-05-07T12:00:00Z-
elib.elibid141-
elib.marc.edtfangmeier-
elib.dct.accessRightsa-
elib.dct.created2001-05-17T10:44:04Z-
elib.dct.modified2001-05-17T15:17:56Z-
dc.contributor.refereeProf. Dr. Ortwin F. Schirmer
dc.subject.dnb29 - Physik, Astronomieger
dc.subject.pacs79.60.-i - Photoemission and photoelectron spectraeng
dc.subject.pacs75.30.Vneng
dc.subject.pacs71.20.-b - Electron density of states and band structure of crystalline solidseng
dc.subject.pacs71.30. heng
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