Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate
We have grown single crystals of NaxCayCoO2 and determined their superstructures as a function of composition using neutron and x-ray diffraction. Inclusion of Ca2+ stabilizes a single superstructure across a wide range of temperatures and concentrations. The superstructure in the Na+ layers is base...
| Hlavní autoři: | , , , , , , , |
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| Médium: | Journal article |
| Jazyk: | English |
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American Physical Society
2014
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| _version_ | 1826265451384012800 |
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| author | Porter, D Roger, M Gutmann, M Uthayakumar, S Prabhakaran, D Boothroyd, A Pandiyan, MS Goff, J |
| author_facet | Porter, D Roger, M Gutmann, M Uthayakumar, S Prabhakaran, D Boothroyd, A Pandiyan, MS Goff, J |
| author_sort | Porter, D |
| collection | OXFORD |
| description | We have grown single crystals of NaxCayCoO2 and determined their superstructures as a function of composition using neutron and x-ray diffraction. Inclusion of Ca2+ stabilizes a single superstructure across a wide range of temperatures and concentrations. The superstructure in the Na+ layers is based on arrays of divacancy clusters with Ca2+ ions occupying the central site, and it has an ideal concentration Na4/7Ca1/7CoO2. Previous measurements of the thermoelectric properties on this system are discussed in light of this superstructure. Na4/7Ca1/7CoO2 corresponds to the maximum in thermoelectric performance of this system. © 2014 American Physical Society. |
| first_indexed | 2024-03-06T20:23:55Z |
| format | Journal article |
| id | oxford-uuid:2ec1c2fb-cca5-4aa7-ae1c-7c8c0e3fc9ad |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:23:55Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:2ec1c2fb-cca5-4aa7-ae1c-7c8c0e3fc9ad2022-03-26T12:50:51ZDivacancy superstructures in thermoelectric calcium-doped sodium cobaltateJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2ec1c2fb-cca5-4aa7-ae1c-7c8c0e3fc9adEnglishSymplectic Elements at OxfordAmerican Physical Society2014Porter, DRoger, MGutmann, MUthayakumar, SPrabhakaran, DBoothroyd, APandiyan, MSGoff, JWe have grown single crystals of NaxCayCoO2 and determined their superstructures as a function of composition using neutron and x-ray diffraction. Inclusion of Ca2+ stabilizes a single superstructure across a wide range of temperatures and concentrations. The superstructure in the Na+ layers is based on arrays of divacancy clusters with Ca2+ ions occupying the central site, and it has an ideal concentration Na4/7Ca1/7CoO2. Previous measurements of the thermoelectric properties on this system are discussed in light of this superstructure. Na4/7Ca1/7CoO2 corresponds to the maximum in thermoelectric performance of this system. © 2014 American Physical Society. |
| spellingShingle | Porter, D Roger, M Gutmann, M Uthayakumar, S Prabhakaran, D Boothroyd, A Pandiyan, MS Goff, J Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate |
| title | Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate |
| title_full | Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate |
| title_fullStr | Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate |
| title_full_unstemmed | Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate |
| title_short | Divacancy superstructures in thermoelectric calcium-doped sodium cobaltate |
| title_sort | divacancy superstructures in thermoelectric calcium doped sodium cobaltate |
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