Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-07-28
Phys. Rev. Lett. 101, 097207 (2008)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, submitted to Physical Review Letters
Scientific paper
10.1103/PhysRevLett.101.097207
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.
Agrestini S.
Chapon Laurent C.
Daoud-Aladine Aziz
Gukasov Arsen
Lees Martin Richard
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