THE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9
The crystal structures of the 6H perovskites Ba3NiRu2O9, and Ba3CoRu2O9 have been refined from neutron powder diffraction data collected at 5 or 2 K. Ba3NiRu2O9 and Ba3ZnRu2O9 have hexagonal symmetry, space group P63 mmc: aNi = 5.7256(2). cNi = 14.0596(2) Å; aZn = 5.7549(2), cZn = 14.1328(2) Å. Ba3C...
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| Formaat: | Journal article |
| Taal: | English |
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1990
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| _version_ | 1826278660440588288 |
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| author | Lightfoot, P Battle, P |
| author_facet | Lightfoot, P Battle, P |
| author_sort | Lightfoot, P |
| collection | OXFORD |
| description | The crystal structures of the 6H perovskites Ba3NiRu2O9, and Ba3CoRu2O9 have been refined from neutron powder diffraction data collected at 5 or 2 K. Ba3NiRu2O9 and Ba3ZnRu2O9 have hexagonal symmetry, space group P63 mmc: aNi = 5.7256(2). cNi = 14.0596(2) Å; aZn = 5.7549(2), cZn = 14.1328(2) Å. Ba3CoRu2O9 undergoes a phase transition from hexagonal symmetry at room temperature to orthorhombic symmetry at 2 K, space group Cmcm: aCo = 5.7456(1), bCo = 9.9177(2), cCo = 14.0862(3) Å. In all three compounds the cation sites within the face-sharing octahedra of the 6H structure are occupied by Ru5+; the corner-sharing octahedra are occupied by Zn2+, Ni2+, or Co2+. The neutron diffraction data show that Ba3NiRu2O9 is magnetically ordered at 5 K, with antiferromagnetic coupling between Ru5+ ions in the Ru2O9 dimers and ferromagnetic coupling along approximately linear Ni2+ORu5+ superexchange pathways. The magnetic moments align along z. Ba3CoRu2O9 is also magnetically ordered with antiferromagnetic coupling in the Ru2O9 dimers, but in this case antiferromagnetic superexchange between Co2+ ions leads to a more complex magnetic structure. © 1990. |
| first_indexed | 2024-03-06T23:47:15Z |
| format | Journal article |
| id | oxford-uuid:715f41f8-cefd-4fb1-abcf-930147a95079 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:47:15Z |
| publishDate | 1990 |
| record_format | dspace |
| spelling | oxford-uuid:715f41f8-cefd-4fb1-abcf-930147a950792022-03-26T19:43:05ZTHE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:715f41f8-cefd-4fb1-abcf-930147a95079EnglishSymplectic Elements at Oxford1990Lightfoot, PBattle, PThe crystal structures of the 6H perovskites Ba3NiRu2O9, and Ba3CoRu2O9 have been refined from neutron powder diffraction data collected at 5 or 2 K. Ba3NiRu2O9 and Ba3ZnRu2O9 have hexagonal symmetry, space group P63 mmc: aNi = 5.7256(2). cNi = 14.0596(2) Å; aZn = 5.7549(2), cZn = 14.1328(2) Å. Ba3CoRu2O9 undergoes a phase transition from hexagonal symmetry at room temperature to orthorhombic symmetry at 2 K, space group Cmcm: aCo = 5.7456(1), bCo = 9.9177(2), cCo = 14.0862(3) Å. In all three compounds the cation sites within the face-sharing octahedra of the 6H structure are occupied by Ru5+; the corner-sharing octahedra are occupied by Zn2+, Ni2+, or Co2+. The neutron diffraction data show that Ba3NiRu2O9 is magnetically ordered at 5 K, with antiferromagnetic coupling between Ru5+ ions in the Ru2O9 dimers and ferromagnetic coupling along approximately linear Ni2+ORu5+ superexchange pathways. The magnetic moments align along z. Ba3CoRu2O9 is also magnetically ordered with antiferromagnetic coupling in the Ru2O9 dimers, but in this case antiferromagnetic superexchange between Co2+ ions leads to a more complex magnetic structure. © 1990. |
| spellingShingle | Lightfoot, P Battle, P THE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9 |
| title | THE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9 |
| title_full | THE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9 |
| title_fullStr | THE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9 |
| title_full_unstemmed | THE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9 |
| title_short | THE CRYSTAL AND MAGNETIC-STRUCTURES OF BA3NIRU2O9, BA3CORU2O9, AND BA3ZNRU2O9 |
| title_sort | crystal and magnetic structures of ba3niru2o9 ba3coru2o9 and ba3znru2o9 |
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