Order by static disorder in the ising chain magnet Ca3Co2-xMnxO6

V. Kiryukhin, Seongsu Lee, W. Ratcliff, Q. Huang, H. T. Yi, Y. J. Choi, S. W. Cheong

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52 Citations (Scopus)


Ising chain compound Ca3Co2-xMnxO6 exhibits up-up-down-down long-range magnetic order (LRO) in a broad range of 0.75<x<1. The LRO is abruptly lost in the narrow vicinity of x=1, and the magnetic state becomes incommensurate. The commensurate state (but not the LRO) is recovered for larger x. This is surprising because the stoichiometric x=1 state exhibits the best Co/Mn ionic order, and the magnetic LRO appears only in the samples with reduced ionic order. We argue that this "order-by-static-disorder" phenomenon may be related to the disruption of the long-range magnetic interactions by the magnetic-site disorder, reducing magnetic frustration.

Original languageEnglish
Article number187202
JournalPhysical review letters
Issue number18
Publication statusPublished - 2009 May 5

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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