Magnetic dynamics in NiTiO3 honeycomb antiferromagnet using neutron scattering
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866912562148278272 |
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| author | Rathnayaka, Srimal Daemen, Luke Hong, Tao Chi, Songxue Calder, Stuart Schneeloch, John A. Cheng, Yongqiang Li, Bing Louca, Despina |
| author_facet | Rathnayaka, Srimal Daemen, Luke Hong, Tao Chi, Songxue Calder, Stuart Schneeloch, John A. Cheng, Yongqiang Li, Bing Louca, Despina |
| contents | The ilmenite NiTiO3 consists of a buckled honeycomb lattice, with the Ni spins aligned ferromagnetically in-plane and antiferromagnetically out-of-plane. Using neutron spectroscopy, the magnetic structure and the dynamics were investigated as a function of temperature. Dispersive acoustic bands and nearly dispersionless optical bands at ~3.7 meV are described by a highly anisotropy Heisenberg model with stronger antiferromagnetic (AFM) out-of-plane, weaker ferromagnetic (FM) in-plane interactions and an anisotropy gap of 0.95 meV. The order parameter yields a critical exponent between the Heisenberg and two-dimensional Ising models, consistent with highly anisotropic Heisenberg systems. The frustration parameter ~ 2 supports a weakly frustrated system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_00513 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Magnetic dynamics in NiTiO3 honeycomb antiferromagnet using neutron scattering Rathnayaka, Srimal Daemen, Luke Hong, Tao Chi, Songxue Calder, Stuart Schneeloch, John A. Cheng, Yongqiang Li, Bing Louca, Despina Materials Science Strongly Correlated Electrons The ilmenite NiTiO3 consists of a buckled honeycomb lattice, with the Ni spins aligned ferromagnetically in-plane and antiferromagnetically out-of-plane. Using neutron spectroscopy, the magnetic structure and the dynamics were investigated as a function of temperature. Dispersive acoustic bands and nearly dispersionless optical bands at ~3.7 meV are described by a highly anisotropy Heisenberg model with stronger antiferromagnetic (AFM) out-of-plane, weaker ferromagnetic (FM) in-plane interactions and an anisotropy gap of 0.95 meV. The order parameter yields a critical exponent between the Heisenberg and two-dimensional Ising models, consistent with highly anisotropic Heisenberg systems. The frustration parameter ~ 2 supports a weakly frustrated system. |
| title | Magnetic dynamics in NiTiO3 honeycomb antiferromagnet using neutron scattering |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.00513 |