Structure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21)
The synthesis and structure determination of 4H-BaMnO3-x (0≤x≤0.35) and 4H-Ba0.5Sr0.5MnO 3-x (0≤x≤0.21) is described. Neutron powder diffraction data unambiguously show the anion vacancies in the oxygen-deficient phases lie in the hexagonal BaO3-x layers, rather than the cubic layers predicted by pr...
| Asıl Yazarlar: | , |
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| Materyal Türü: | Journal article |
| Dil: | English |
| Baskı/Yayın Bilgisi: |
2006
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| _version_ | 1826290006271983616 |
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| author | Adkin, J Hayward, M |
| author_facet | Adkin, J Hayward, M |
| author_sort | Adkin, J |
| collection | OXFORD |
| description | The synthesis and structure determination of 4H-BaMnO3-x (0≤x≤0.35) and 4H-Ba0.5Sr0.5MnO 3-x (0≤x≤0.21) is described. Neutron powder diffraction data unambiguously show the anion vacancies in the oxygen-deficient phases lie in the hexagonal BaO3-x layers, rather than the cubic layers predicted by previous structural models. The localization of anion vacancies in the hexagonal layers is discussed on the basis of the local co-ordination polyhedra of the metal cations. Low-temperature neutron diffraction data show the oxidized materials adopt antiferromagnetic ordered structures (Ba0.5Sr0.5MnO2.99: TN=265K). Anion-deficient phases do not achieve magnetic order suggesting the Mn(III/IV) charge disorder suppresses long-range magnetic order. © 2005 Elsevier Inc. All rights reserved. |
| first_indexed | 2024-03-07T02:37:35Z |
| format | Journal article |
| id | oxford-uuid:a95006a5-ed1f-462b-8b2c-148f8660dac6 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:37:35Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:a95006a5-ed1f-462b-8b2c-148f8660dac62022-03-27T03:07:37ZStructure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a95006a5-ed1f-462b-8b2c-148f8660dac6EnglishSymplectic Elements at Oxford2006Adkin, JHayward, MThe synthesis and structure determination of 4H-BaMnO3-x (0≤x≤0.35) and 4H-Ba0.5Sr0.5MnO 3-x (0≤x≤0.21) is described. Neutron powder diffraction data unambiguously show the anion vacancies in the oxygen-deficient phases lie in the hexagonal BaO3-x layers, rather than the cubic layers predicted by previous structural models. The localization of anion vacancies in the hexagonal layers is discussed on the basis of the local co-ordination polyhedra of the metal cations. Low-temperature neutron diffraction data show the oxidized materials adopt antiferromagnetic ordered structures (Ba0.5Sr0.5MnO2.99: TN=265K). Anion-deficient phases do not achieve magnetic order suggesting the Mn(III/IV) charge disorder suppresses long-range magnetic order. © 2005 Elsevier Inc. All rights reserved. |
| spellingShingle | Adkin, J Hayward, M Structure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21) |
| title | Structure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21) |
| title_full | Structure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21) |
| title_fullStr | Structure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21) |
| title_full_unstemmed | Structure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21) |
| title_short | Structure and magnetism of 4H-BaMnO3-x (0 <= x <= 0.35) and 4H-Ba0.5Sr0.5MnO3-x (0 <= x <= 0.21) |
| title_sort | structure and magnetism of 4h bamno3 x 0 lt x lt 0 35 and 4h ba0 5sr0 5mno3 x 0 lt x lt 0 21 |
| work_keys_str_mv | AT adkinj structureandmagnetismof4hbamno3x0ltxlt035and4hba05sr05mno3x0ltxlt021 AT haywardm structureandmagnetismof4hbamno3x0ltxlt035and4hba05sr05mno3x0ltxlt021 |