Slow Magnetic Order-Order Transition in the Spin Chain Antiferromagnet Ca3Co2O6

S. Agrestini; C. L. Fleck; L. C. Chapon; C. Mazzoli; A. Bombardi; M. R. Lees; O. A. Petrenko

doi:10.1103/PhysRevLett.106.197204

Slow Magnetic Order-Order Transition in the Spin Chain Antiferromagnet Ca3Co2O6

Strongly Correlated Electrons 2011-05-17 v2 Materials Science

Authors: S. Agrestini , C. L. Fleck , L. C. Chapon , C. Mazzoli , A. Bombardi , M. R. Lees , O. A. Petrenko

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Abstract

Using powder neutron diffraction we have discovered an unusual magnetic order-order transition in the Ising spin chain compound Ca3Co2O6. On lowering the temperature an antiferromagnetic phase with propagation vector k=(0.5,-0.5,1) emerges from a higher temperature spin density wave structure with k=(0, 0, 1.01). This transition occurs over an unprecedented time-scale of several hours and is never complete.

Keywords

magnetic order-order transition Ising spin chain antiferromagnet Ca3Co2O6 powder neutron diffraction spin density wave

Cite

@article{arxiv.1104.3880,
  title  = {Slow Magnetic Order-Order Transition in the Spin Chain Antiferromagnet Ca3Co2O6},
  author = {S. Agrestini and C. L. Fleck and L. C. Chapon and C. Mazzoli and A. Bombardi and M. R. Lees and O. A. Petrenko},
  journal= {arXiv preprint arXiv:1104.3880},
  year   = {2011}
}

Comments

4 pages + 2 pages of supplementary information, to appear in Physical Review Letters

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