Origin of the long-wavelength magnetic modulation in Ca3Co2O6

Abstract

The origin of the long-wavelength incommensurate magnetic structure of Ca3Co2O6 is discussed considering possible inter-chains super-superexchange paths. The experimental value of the propagation vector k=(0,0,$\Delta$) with $\Delta$ $>$ 1 can be reproduced only if one considers the next nearest super-superexchange interaction. A spin-dimer analysis using the Extended-Huckel Tight-Binding method confirms that, despite longer interatomic Co-Co distances, the latter interaction is indeed much stronger. The stability of the observed structure with respect to certain commensurate states is discussed.

References in corpus (5)

• Nature of magnetism in Ca${}_3$Co${}_2$O${}_6$
• The nature of the magnetic order in Ca3Co2O6
• The Origin of Magnetic Interactions in Ca3Co2O6
• Incommensurate magnetic ground state revealed by RXS in the frustrated spin system Ca3Co2O6
• Extended moment formation and magnetic ordering in the trigonal chain compound Ca3Co2O6

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