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Magnetostructural relationship in the tetrahedral spin-chain oxide CsCoO2

Ali, N.Z.; Williams, R.C.; Xiao, F.; Clark, S.J.; Lancaster, T.; Blundell, S.J.; Sheptyakov, D.V.; Jansen, M.

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Authors

N.Z. Ali

R.C. Williams

F. Xiao

S.J. Blundell

D.V. Sheptyakov

M. Jansen



Abstract

We have investigated the structural and magnetic transitions in CsCoO2 using calorimetric measurements, neutron powder diffraction, density functional theory calculations, and muon-spin relaxation measurements. CsCoO2 exhibits three-dimensional long-range antiferromagnetic (AFM) order at 424 K, resulting in antiferromagnetic alignment of chains of ferromagnetically ordered Co-Co spin dimers. Although there is no change in magnetic structure around a structural transition at T∗=100 K, the resulting bifurcation of corner-shared Co-O-Co bond angles causes a weakening of the AFM interaction for one set of bonds along the chains. Consequently, the system undergoes a complex freezing out of relaxation processes on cooling.

Citation

Ali, N., Williams, R., Xiao, F., Clark, S., Lancaster, T., Blundell, S., …Jansen, M. (2015). Magnetostructural relationship in the tetrahedral spin-chain oxide CsCoO2. Physical review B, 91(2), Article 024419. https://doi.org/10.1103/physrevb.91.024419

Journal Article Type Article
Online Publication Date Jan 20, 2015
Publication Date Jan 20, 2015
Deposit Date Apr 23, 2015
Publicly Available Date Apr 27, 2015
Journal Physical Review B
Print ISSN 1098-0121
Electronic ISSN 1550-235X
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 91
Issue 2
Article Number 024419
DOI https://doi.org/10.1103/physrevb.91.024419
Related Public URLs arXiv:1410.3686

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Copyright Statement
Reprinted with permission from the American Physical Society: Physical Review B 91, 024419 © 2015 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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