Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/14176
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dc.titleCMR effect and related properties of Mo-based oxides with double-perovskite structure
dc.contributor.authorYUAN CAILEI
dc.date.accessioned2010-04-08T10:40:36Z
dc.date.available2010-04-08T10:40:36Z
dc.date.issued2004-09-14
dc.identifier.citationYUAN CAILEI (2004-09-14). CMR effect and related properties of Mo-based oxides with double-perovskite structure. ScholarBank@NUS Repository.
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/14176
dc.description.abstractIn this thesis, firstly grain boundary modification studies of Sr2FeMoO6 polycrystals are presented. We reported our investigations on the effect of SrMoO4 impurities on the magnetoresistance of Sr2FeMoO6 polycrystals. They led to an improvement in the understanding on the intergrain tunneling magnetoresistance of the double perovskite materials, especially at a relatively low magnetic field and room temperature. Secondly, Sr2CoMoO6-I' film was investigated at high temperatures, especially around TC. It resulted in new direct evidence that a phase separation scenario also exists in the ordered double-perovskite structures materials. Thirdly, the substitution of Fe3+ ions by Cu2+ ions in Sr2FeMoO6 was found to facilitate the formation of the ordered structure, which also induces the occurrence of Fe3+I' ions and the double exchange (DE) interaction in Fe3+-O-Mo-O-Fe3+I'. Finally, for perovskite manganites La0.7Ca0.3Mn1-xCuxOy, the substitution of Mn by Cu was found to suppress the ferromagnetic ordering of the material.
dc.language.isoen
dc.subjectMagnetoresistance; Grain boundaries; Double perovskites; Electric transport; Magnetically ordered materials; Half metal;
dc.typeThesis
dc.contributor.departmentPHYSICS
dc.contributor.supervisorONG PHEE POH, PETER
dc.description.degreePh.D
dc.description.degreeconferredDOCTOR OF PHILOSOPHY
dc.identifier.isiutNOT_IN_WOS
Appears in Collections:Ph.D Theses (Open)

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