Journal
PHYSICAL REVIEW LETTERS
Volume 101, Issue 9, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.101.097207
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Funding
- EPSRC, UK [EP/CO00757/1]
- European Commission [RII3-CT-2004-506008, RII3-CT-2003-505925]
- Engineering and Physical Sciences Research Council [EP/C000757/1] Funding Source: researchfish
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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 coexists with a shorter-range order with a correlation length scale of similar to 180 angstrom in the ab plane. Remarkably, on cooling, the volume of material exhibiting short-range order increases at the expense of the long-range order.
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