Magnetic phases in the Kagome staircase compound Co3V2O8 studied using powder neutron diffraction
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 1098-0121Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevB.75.094432
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|
|Official Date:||March 2007|
|Number of Pages:||6|
|Page Range:||Article: 094432|
|Access rights to Published version:||Restricted or Subscription Access|
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