Neutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7
The crystal structures of Sr2HoMn2O7 and Sr2YMn2O7 have been determined at 290 and 1.7 K from neutron and X-ray powder diffraction data. Both are distorted Ruddlesden-Popper structures formed by the intergrowth of rock-salt-like layers and perovskite-like blocks of tilted MnO6 octahedra (space group...
| Main Authors: | , , , , , |
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| 格式: | Journal article |
| 语言: | English |
| 出版: |
1997
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| _version_ | 1826284001190477824 |
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| author | Battle, P Millburn, J Rosseinsky, M Spring, L Vente, J Radaelli, P |
| author_facet | Battle, P Millburn, J Rosseinsky, M Spring, L Vente, J Radaelli, P |
| author_sort | Battle, P |
| collection | OXFORD |
| description | The crystal structures of Sr2HoMn2O7 and Sr2YMn2O7 have been determined at 290 and 1.7 K from neutron and X-ray powder diffraction data. Both are distorted Ruddlesden-Popper structures formed by the intergrowth of rock-salt-like layers and perovskite-like blocks of tilted MnO6 octahedra (space group P42/mnm; for Ho at 290 Ka = 5.40388(5), c = 19.9050-(2) Å). The majority of the lanthanide cations are located in the rock-salt layers. Neither structure changes significantly on cooling to 1.7 K. There is evidence for neither charge ordering of Mn3+ and Mn4+ cations nor for long-range magnetic ordering. The magnetic susceptibility maximum observed previously is thus confirmed as signifying a transition to a spin-glass phase. The behavior of these compounds is contrasted with that of other Mn oxides which show long-range magnetic order and colossal magnetoresistance. |
| first_indexed | 2024-03-07T01:07:17Z |
| format | Journal article |
| id | oxford-uuid:8bcc521a-df3d-4e6d-a5da-0592940d24d8 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:07:17Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:8bcc521a-df3d-4e6d-a5da-0592940d24d82022-03-26T22:40:16ZNeutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:8bcc521a-df3d-4e6d-a5da-0592940d24d8EnglishSymplectic Elements at Oxford1997Battle, PMillburn, JRosseinsky, MSpring, LVente, JRadaelli, PThe crystal structures of Sr2HoMn2O7 and Sr2YMn2O7 have been determined at 290 and 1.7 K from neutron and X-ray powder diffraction data. Both are distorted Ruddlesden-Popper structures formed by the intergrowth of rock-salt-like layers and perovskite-like blocks of tilted MnO6 octahedra (space group P42/mnm; for Ho at 290 Ka = 5.40388(5), c = 19.9050-(2) Å). The majority of the lanthanide cations are located in the rock-salt layers. Neither structure changes significantly on cooling to 1.7 K. There is evidence for neither charge ordering of Mn3+ and Mn4+ cations nor for long-range magnetic ordering. The magnetic susceptibility maximum observed previously is thus confirmed as signifying a transition to a spin-glass phase. The behavior of these compounds is contrasted with that of other Mn oxides which show long-range magnetic order and colossal magnetoresistance. |
| spellingShingle | Battle, P Millburn, J Rosseinsky, M Spring, L Vente, J Radaelli, P Neutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7 |
| title | Neutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7 |
| title_full | Neutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7 |
| title_fullStr | Neutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7 |
| title_full_unstemmed | Neutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7 |
| title_short | Neutron diffraction study of the structural and electronic properties of Sr2HoMn2O7 and Sr2YMn2O7 |
| title_sort | neutron diffraction study of the structural and electronic properties of sr2homn2o7 and sr2ymn2o7 |
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