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Magnetic phases in the Kagome staircase compound Co3V2O8 studied using powder neutron diffraction
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Wilson, N. R., Petrenko, O. A. and Chapon, L. C.. (2007) Magnetic phases in the Kagome staircase compound Co3V2O8 studied using powder neutron diffraction. Physical Review B, Vol.75 (No.9). Article: 094432. ISSN 1098-0121
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Official URL: http://dx.doi.org/10.1103/PhysRevB.75.094432
Abstract
The low temperature properties of the Kagome-type system Co3V2O8 have been studied by powder neutron diffraction both in zero field and in applied magnetic fields of up to 8 T. Below 6 K, the zero-field ground state is ferromagnetic with the magnetic moments aligned along the a axis. The size of the moment on one of the two Co sites, the so-called cross-tie site, is considerably reduced compared to the fully polarized state. The application of a magnetic field in this phase is found to rapidly enhance the cross-tie site magnetic moment, which reaches the expected value of similar to 3 mu(B) by the maximum applied field of 8 T. Different reorientation behaviors are found for the Co cross-tie and spine sites, suggesting a more pronounced easy-axis anisotropy for moments on the spine sites. Rietveld refinements reveal that a simple model, where the spins on both cross-tie and spine sites rotate in the ac plane in a magnetic field, reproduces the experimental diffraction patterns well. In addition, it is found that at higher temperatures and moderate magnetic fields, the incommensurate antiferromagnetic order, corresponding to a transverse sinusoidal modulation above 8 K, is suppressed to be replaced by ferromagnetic order.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Divisions: | Faculty of Science > Physics |
| Journal or Publication Title: | Physical Review B |
| Publisher: | American Physical Society |
| ISSN: | 1098-0121 |
| Official Date: | March 2007 |
| Volume: | Vol.75 |
| Number: | No.9 |
| Number of Pages: | 6 |
| Page Range: | Article: 094432 |
| Identification Number: | 10.1103/PhysRevB.75.094432 |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/32151 |
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