Structures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) Phases
Topotactic reduction of La 1-xSr xMnO 3 (0.67 ≤ x ≤1) phases with sodium hydride yields a series of isoelectronic materials of composition La 1-xSr xMnO 3-(0.5+x)/2. Lanthanum rich members of the series (0.67 ≤x ≤0.83) adopt anion deficient perovskite structures with a 6-layer -OTOOT'O- stackin...
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| Format: | Journal article |
| Language: | English |
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2012
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| _version_ | 1797062499822993408 |
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| author | Dixon, E Hadermann, J Hayward, M |
| author_facet | Dixon, E Hadermann, J Hayward, M |
| author_sort | Dixon, E |
| collection | OXFORD |
| description | Topotactic reduction of La 1-xSr xMnO 3 (0.67 ≤ x ≤1) phases with sodium hydride yields a series of isoelectronic materials of composition La 1-xSr xMnO 3-(0.5+x)/2. Lanthanum rich members of the series (0.67 ≤x ≤0.83) adopt anion deficient perovskite structures with a 6-layer -OTOOT'O- stacking sequence of sheets of octahedra/square-based pyramids (O) and sheets of tetrahedra (T). The strontium rich members of the series (0.83 ≤x ≤1) incorporate "step defects" into this 6-layer structure in which the OTOOT'O stacking sequence is converted into either OOTOOT' or TOOT'OO at a defect plane which runs perpendicular to the [201] lattice plane. The step defects appear to provide a mechanism to relieve lattice strain and accommodate additional anion deficiency in phases with x > 0.83. Magnetization and neutron diffraction data indicate La 1-xSr xMnO 3-(0.5+x)/2 phases adopt antiferromagnetically ordered states at low-temperature in which the ordered arrangement of magnetic spins is incommensurate with the crystallographic lattice. © 2012 American Chemical Society. |
| first_indexed | 2024-03-06T20:46:24Z |
| format | Journal article |
| id | oxford-uuid:360f0bd3-182b-4cea-bbd3-586269af77a9 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:46:24Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:360f0bd3-182b-4cea-bbd3-586269af77a92022-03-26T13:35:30ZStructures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) PhasesJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:360f0bd3-182b-4cea-bbd3-586269af77a9EnglishSymplectic Elements at Oxford2012Dixon, EHadermann, JHayward, MTopotactic reduction of La 1-xSr xMnO 3 (0.67 ≤ x ≤1) phases with sodium hydride yields a series of isoelectronic materials of composition La 1-xSr xMnO 3-(0.5+x)/2. Lanthanum rich members of the series (0.67 ≤x ≤0.83) adopt anion deficient perovskite structures with a 6-layer -OTOOT'O- stacking sequence of sheets of octahedra/square-based pyramids (O) and sheets of tetrahedra (T). The strontium rich members of the series (0.83 ≤x ≤1) incorporate "step defects" into this 6-layer structure in which the OTOOT'O stacking sequence is converted into either OOTOOT' or TOOT'OO at a defect plane which runs perpendicular to the [201] lattice plane. The step defects appear to provide a mechanism to relieve lattice strain and accommodate additional anion deficiency in phases with x > 0.83. Magnetization and neutron diffraction data indicate La 1-xSr xMnO 3-(0.5+x)/2 phases adopt antiferromagnetically ordered states at low-temperature in which the ordered arrangement of magnetic spins is incommensurate with the crystallographic lattice. © 2012 American Chemical Society. |
| spellingShingle | Dixon, E Hadermann, J Hayward, M Structures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) Phases |
| title | Structures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) Phases |
| title_full | Structures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) Phases |
| title_fullStr | Structures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) Phases |
| title_full_unstemmed | Structures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) Phases |
| title_short | Structures and Magnetism of La1-xSrxMnO3-(0.5+x)/2 (0.67 <= x <= 1) Phases |
| title_sort | structures and magnetism of la1 xsrxmno3 0 5 x 2 0 67 lt x lt 1 phases |
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