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  Spin correlations in Ca3Co2O6: Polarized-neutron diffraction and Monte Carlo study

Paddison, J. A. M., Agrestini, S., Lees, M. R., Fleck, C. L., Deen, P. P., Goodwin, A. L., et al. (2014). Spin correlations in Ca3Co2O6: Polarized-neutron diffraction and Monte Carlo study. Physical Review B, 90(1): 014411, pp. 014411-1-014411-10. doi:10.1103/PhysRevB.90.014411.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0023-F202-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0023-F203-7
Genre: Journal Article

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 Creators:
Paddison, Joseph A. M.1, Author
Agrestini, Stefano2, Author              
Lees, Martin R.1, Author
Fleck, Catherine L.1, Author
Deen, Pascale P.1, Author
Goodwin, Andrew L.1, Author
Stewart, J. Ross1, Author
Petrenko, Oleg A.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Stefano Agrestini, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863459              

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 Abstract: We present polarized-neutron diffraction measurements of the Ising-type spin-chain compound Ca3Co2O6 above and below the magnetic ordering temperature T-N. Below T-N, a clear evolution from a pure spin-density wave (SDW) structure to a mixture of SDW and commensurate antiferromagnet (CAFM) structures is observed on cooling. For a rapidly cooled sample, the majority phase at low temperature is the SDW, while if the cooling is performed sufficiently slowly, then the SDW and the CAFM structure coexist between 1.5 and 10 K. Above T-N, we use Monte Carlo methods to analyze the magnetic diffuse scattering data. We show that both intrachain and interchain correlations persist above T-N, but are essentially decoupled. Intrachain correlations resemble the one-dimensional ferromagnetic Ising model, while interchain correlations resemble the frustrated triangular-lattice antiferromagnet. Using previously published bulk property measurements and our neutron diffraction data, we obtain values of the ferromagnetic and antiferromagnetic exchange interactions and the single-ion anisotropy.

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Language(s): eng - English
 Dates: 20142014-07-11
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Degree: -

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Title: Physical Review B
  Other : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 90 (1) Sequence Number: 014411 Start / End Page: 014411-1 - 014411-10 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008