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

PHYSICAL REVIEW LETTERS (2011)

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PHYSICAL REVIEW LETTERS
卷 106, 期 19, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.106.197204

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Physics, Multidisciplinary

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  1. EPSRC, United Kingdom [EP/C000757/1]
  2. European Commission [RII3-CT-2004-506008, RII3-CT-2003-505925]
  3. Engineering and Physical Sciences Research Council [EP/C000757/1] Funding Source: researchfish

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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 a 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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