Non-collinear long-range magnetic ordering in HgCr2S4
The low-temperature magnetic structure of \HG has been studied by high-resolution powder neutron diffraction. Long-range incommensurate magnetic order sets in at T$_N\sim$22K with propagation vector \textbf{k}=(0,0,$\sim$0.18). On cooling below T$_N$, the propagation vector increases and saturates a...
| Main Authors: | , , , , |
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| Format: | Journal article |
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2006
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| _version_ | 1826293715464880128 |
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| author | Chapon, L Radaelli, P Hor, Y Telling, M Mitchell, J |
| author_facet | Chapon, L Radaelli, P Hor, Y Telling, M Mitchell, J |
| author_sort | Chapon, L |
| collection | OXFORD |
| description | The low-temperature magnetic structure of \HG has been studied by high-resolution powder neutron diffraction. Long-range incommensurate magnetic order sets in at T$_N\sim$22K with propagation vector \textbf{k}=(0,0,$\sim$0.18). On cooling below T$_N$, the propagation vector increases and saturates at the commensurate value \textbf{k}=(0,0,0.25). The magnetic structure below T$_N$ consists of ferromagnetic layers in the \textit{ab}-plane stacked in a spiral arrangement along the \textit{c}-axis. Symmetry analysis using corepresentations theory reveals a point group symmetry in the ordered magnetic phase of 422 (D$_4$), which is incompatible with macroscopic ferroelectricity. This finding indicates that the spontaneous electric polarization observed experimentally cannot be coupled to the magnetic order parameter. |
| first_indexed | 2024-03-07T03:34:26Z |
| format | Journal article |
| id | oxford-uuid:bbd04dd1-438d-47ec-9ac4-0602ce787eb5 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T03:34:26Z |
| publishDate | 2006 |
| record_format | dspace |
| spelling | oxford-uuid:bbd04dd1-438d-47ec-9ac4-0602ce787eb52022-03-27T05:19:45ZNon-collinear long-range magnetic ordering in HgCr2S4Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:bbd04dd1-438d-47ec-9ac4-0602ce787eb5Symplectic Elements at Oxford2006Chapon, LRadaelli, PHor, YTelling, MMitchell, JThe low-temperature magnetic structure of \HG has been studied by high-resolution powder neutron diffraction. Long-range incommensurate magnetic order sets in at T$_N\sim$22K with propagation vector \textbf{k}=(0,0,$\sim$0.18). On cooling below T$_N$, the propagation vector increases and saturates at the commensurate value \textbf{k}=(0,0,0.25). The magnetic structure below T$_N$ consists of ferromagnetic layers in the \textit{ab}-plane stacked in a spiral arrangement along the \textit{c}-axis. Symmetry analysis using corepresentations theory reveals a point group symmetry in the ordered magnetic phase of 422 (D$_4$), which is incompatible with macroscopic ferroelectricity. This finding indicates that the spontaneous electric polarization observed experimentally cannot be coupled to the magnetic order parameter. |
| spellingShingle | Chapon, L Radaelli, P Hor, Y Telling, M Mitchell, J Non-collinear long-range magnetic ordering in HgCr2S4 |
| title | Non-collinear long-range magnetic ordering in HgCr2S4 |
| title_full | Non-collinear long-range magnetic ordering in HgCr2S4 |
| title_fullStr | Non-collinear long-range magnetic ordering in HgCr2S4 |
| title_full_unstemmed | Non-collinear long-range magnetic ordering in HgCr2S4 |
| title_short | Non-collinear long-range magnetic ordering in HgCr2S4 |
| title_sort | non collinear long range magnetic ordering in hgcr2s4 |
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