The nature of the magnetic order in Ca3Co2O6

S. Agrestini; L. C. Chapon; A. Daoud-Aladine; J. Schefer; A. Gukasov; C. Mazzoli; M. R. Lees; O. A. Petrenko

doi:10.1103/PhysRevLett.101.097207

The nature of the magnetic order in Ca3Co2O6

Strongly Correlated Electrons 2008-09-17 v1

Authors: S. Agrestini , L. C. Chapon , A. Daoud-Aladine , J. Schefer , A. Gukasov , C. Mazzoli , M. R. Lees , O. A. Petrenko

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Abstract

We present a detailed powder and single crystal neutron diffraction study of the spin chain compound Ca3Co2O6. Below 25 K, the system orders magnetically with a modulated partially disordered antiferromagnetic structure. We give a description of the magnetic interactions in the system which is consistent with this magnetic structure. Our study also reveals that the long-range magnetic order co-exists with a shorter range order with a correlation length scale of 180 A in the ab plane. Remarkably, on cooling, the volume of material exhibiting short range order increases at the expense of the long-range order.

Keywords

magnetic order spin chain neutron diffraction partially disordered antiferromagnet short-range order Ca3Co2O6

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@article{arxiv.0807.4489,
  title  = {The nature of the magnetic order in Ca3Co2O6},
  author = {S. Agrestini and L. C. Chapon and A. Daoud-Aladine and J. Schefer and A. Gukasov and C. Mazzoli and M. R. Lees and O. A. Petrenko},
  journal= {arXiv preprint arXiv:0807.4489},
  year   = {2008}
}

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4 pages, submitted to Physical Review Letters

The nature of the magnetic order in Ca3Co2O6

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