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

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

2011-04-19

arxiv.org/abs/1104.3880v2

Phys. Rev. Lett. 106, 197204 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1103/PhysRevLett.106.197204

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.

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