Agrestini, S., Chapon, L. C., Daoud-Aladine, A., Schefer, J., Gukasov, A., Mazzoli, C., Lees, Martin R. and Petrenko, Oleg (2008) Nature of the magnetic order in Ca3Co2O6. Physical Review Letters, Vol.101 (No.9). Article no. 097207 . doi:10.1103/PhysRevLett.101.097207

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Abstract

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.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Neutrons -- Diffraction, Calcium compounds -- Magnetic properties, Magnetization, Ferrimagnetism
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	29 August 2008
Dates:	Date Event 29 August 2008 Published
Volume:	Vol.101
Number:	No.9
Number of Pages:	4
Page Range:	Article no. 097207
DOI:	10.1103/PhysRevLett.101.097207
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC), Sixth Framework Programme (European Commission) (FP6)
Grant number:	EP/CO00757/1 (EPSRC), RII3-CT-2004-506008 (FP6), RII3-CT-2003-505925 (FP6)

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