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Studies of Oxygen Deficient Complex Cobaltates with Perovskite Related Structures
Stockholm University, Faculty of Science, Department of Physical, Inorganic and Structural Chemistry.
2006 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The present thesis deals with the investigation of some perovskite related complex cobaltates. The phases Sr2Co2-xGaxO5 (0.3 ≤ x ≤ 0.7), Sr2Co2-xAlxO5 (0.3 ≤ x ≤ 0.5), Sr1-xBixCoO3-y (0.1 ≤ x ≤ 0.2), Sr0.75Y0.25Co1-xGaxO2.625 (0.125 ≤ x ≤ 0.375) and Sr0.75Y0.25Co1-xFexO2.625+δ (0.125 ≤ x ≤ 0.625) were synthesised and characterised. All these compounds crystallises with similar structures, they are all composed by altering layers of octahedra and tetrahedra although in the two former, the tetrahedra are organised in chains (the Brownmillerite structure), while in the latter three the tetrahedra arranges as segregated Co4O12 units (the 314 type structure). The techniques X-ray and neutron diffraction, transmission electron microscopy, thermal analysis and magnetic measurements were used to track structural and important physical properties.

Place, publisher, year, edition, pages
Stockholm: Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi , 2006. , 53 p.
National Category
Other Basic Medicine
Identifiers
URN: urn:nbn:se:su:diva-1047ISBN: 91-7155-254-5 (print)OAI: oai:DiVA.org:su-1047DiVA: diva2:189296
Public defence
2006-06-02, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 13:00
Opponent
Supervisors
Available from: 2006-05-11 Created: 2006-05-11Bibliographically approved
List of papers
1. Synthesis and structural studies of Sr2Co2-xGaxO5, 0.3 ≤ x ≤ 0.8
Open this publication in new window or tab >>Synthesis and structural studies of Sr2Co2-xGaxO5, 0.3 ≤ x ≤ 0.8
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2003 In: Journal of Solid State Chemistry, ISSN 0022-4596, Vol. 173, no 2, 395-406 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-22701 (URN)
Note
Part of urn:nbn:se:su:diva-1047Available from: 2006-05-11 Created: 2006-05-11Bibliographically approved
2. Synthesis and structural studies of Sr2Co2-xAlxO5, 0.3 ≤ x ≤ 0.5
Open this publication in new window or tab >>Synthesis and structural studies of Sr2Co2-xAlxO5, 0.3 ≤ x ≤ 0.5
Show others...
2004 In: Journal of Solid State Chemistry, ISSN 0022-4596, Vol. 177, no 4-5, 1592-1597 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-22702 (URN)
Note
Part of urn:nbn:se:su:diva-1047Available from: 2006-05-11 Created: 2006-05-11Bibliographically approved
3. Influence of oxygen defects on the structure and magnetic properties of Sr1-xBixCoO3-y (0.1 ≤ x ≤ 0.2) supercell perovskites
Open this publication in new window or tab >>Influence of oxygen defects on the structure and magnetic properties of Sr1-xBixCoO3-y (0.1 ≤ x ≤ 0.2) supercell perovskites
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2006 In: Chemistry of Materials, ISSN 1520-5002, Vol. 18, no 5, 1354 - 1364 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-22703 (URN)
Note
Part of urn:nbn:se:su:diva-1047Available from: 2006-05-11 Created: 2006-05-11Bibliographically approved
4. Synthesis and characterization of Sr0.75Y0.25Co1−xMxO2.625+δ (M=Ga, 0.125≤ x≤ 0.500 and M=Fe, 0.125≤ x≤ 0.875)
Open this publication in new window or tab >>Synthesis and characterization of Sr0.75Y0.25Co1−xMxO2.625+δ (M=Ga, 0.125≤ x≤ 0.500 and M=Fe, 0.125≤ x≤ 0.875)
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2006 In: Journal of Solid State Chemistry, ISSN 0022-4596, Vol. 179, no 5, 1434-1444 p.Article in journal (Refereed) Published
Identifiers
urn:nbn:se:su:diva-22704 (URN)
Note
Part of urn:nbn:se:su:diva-1047Available from: 2006-05-11 Created: 2006-05-11Bibliographically approved

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