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Nature of the magnetic order in Ca3Co2O6

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Agrestini, S., Chapon, L. C., Daoud-Aladine, A., Schefer, J., Gukasov, A., Mazzoli, C., Lees, Martin R. and Petrenko, O. A.. (2008) Nature of the magnetic order in Ca3Co2O6. Physical Review Letters, Vol.101 (No.9). Article no. 097207 . ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.101.097207

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:

Page Range:

Article no. 097207

Identification Number:

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)

References:

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hexagonal R setting. There is nothing special about x ¼ 1
3
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3 .
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