Neutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4
The S = 3/2, quasi-one-dimensional (1D) zig-zag chain Heisenberg antiferromagnet Li3RuO4 has been investigated using heat capacity, inelastic neutron scattering, neutron diffraction, and μSR measurements on a powder sample. Our neutron diffraction and μSR studies confirm a long-range ordering of the...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2011
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| _version_ | 1797087404217073664 |
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| author | Manuel, P Adroja, D Lindgard, P Hillier, A Battle, P Son, W Whangbo, M |
| author_facet | Manuel, P Adroja, D Lindgard, P Hillier, A Battle, P Son, W Whangbo, M |
| author_sort | Manuel, P |
| collection | OXFORD |
| description | The S = 3/2, quasi-one-dimensional (1D) zig-zag chain Heisenberg antiferromagnet Li3RuO4 has been investigated using heat capacity, inelastic neutron scattering, neutron diffraction, and μSR measurements on a powder sample. Our neutron diffraction and μSR studies confirm a long-range ordering of the magnetic moments on the Ru5+ cations below 40 K. The magnetic excitations were measured at various temperatures above and below the three-dimensional (3D) ordering temperature in order to understand the broad peak observed in the temperature dependence of the magnetic susceptibility. At 5 K we have observed two well-defined magnetic excitations at 5.5 meV and 8.5 meV and a weak low-energy peak near ∼2 meV. We interpret the 5.5 meV energy peak as a 1D zone-boundary mode and that at 8.5 meV as arising from a maximum away from the zone boundary in the dispersion curve for spin-wave modes along the chain of Ru5+ ions. The weaker peak near 2 meV is thought to arise from a weak interchain coupling. Our data are best reproduced using a model with three intrachain interactions and one weak interchain interaction. The experimental spin-exchange interactions are in good agreement with those calculated for a 1D model by density functional theory (DFT) methods. Furthermore, above TN we observe strong diffuse scattering at the same Q-position as the 5.5 meV mode, which suggests the presence of short-range magnetic correlations above TN. We have estimated the correlation length ξ ∼ 2.9 at 50 K, which is close to 2.99, the shortest distance between the Ru5+ cations along the zig-zag chain. © 2011 American Physical Society. |
| first_indexed | 2024-03-07T02:35:15Z |
| format | Journal article |
| id | oxford-uuid:a88f9400-ad9c-4ed8-828d-d45149ff96cd |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:35:15Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:a88f9400-ad9c-4ed8-828d-d45149ff96cd2022-03-27T03:02:33ZNeutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:a88f9400-ad9c-4ed8-828d-d45149ff96cdEnglishSymplectic Elements at Oxford2011Manuel, PAdroja, DLindgard, PHillier, ABattle, PSon, WWhangbo, MThe S = 3/2, quasi-one-dimensional (1D) zig-zag chain Heisenberg antiferromagnet Li3RuO4 has been investigated using heat capacity, inelastic neutron scattering, neutron diffraction, and μSR measurements on a powder sample. Our neutron diffraction and μSR studies confirm a long-range ordering of the magnetic moments on the Ru5+ cations below 40 K. The magnetic excitations were measured at various temperatures above and below the three-dimensional (3D) ordering temperature in order to understand the broad peak observed in the temperature dependence of the magnetic susceptibility. At 5 K we have observed two well-defined magnetic excitations at 5.5 meV and 8.5 meV and a weak low-energy peak near ∼2 meV. We interpret the 5.5 meV energy peak as a 1D zone-boundary mode and that at 8.5 meV as arising from a maximum away from the zone boundary in the dispersion curve for spin-wave modes along the chain of Ru5+ ions. The weaker peak near 2 meV is thought to arise from a weak interchain coupling. Our data are best reproduced using a model with three intrachain interactions and one weak interchain interaction. The experimental spin-exchange interactions are in good agreement with those calculated for a 1D model by density functional theory (DFT) methods. Furthermore, above TN we observe strong diffuse scattering at the same Q-position as the 5.5 meV mode, which suggests the presence of short-range magnetic correlations above TN. We have estimated the correlation length ξ ∼ 2.9 at 50 K, which is close to 2.99, the shortest distance between the Ru5+ cations along the zig-zag chain. © 2011 American Physical Society. |
| spellingShingle | Manuel, P Adroja, D Lindgard, P Hillier, A Battle, P Son, W Whangbo, M Neutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4 |
| title | Neutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4 |
| title_full | Neutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4 |
| title_fullStr | Neutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4 |
| title_full_unstemmed | Neutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4 |
| title_short | Neutron scattering and mu SR investigations of quasi-one-dimensional magnetism in the spin=3/2 compound Li3RuO4 |
| title_sort | neutron scattering and mu sr investigations of quasi one dimensional magnetism in the spin 3 2 compound li3ruo4 |
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