Magnetic structure and phase diagram in a spin-chain system: Ca${}_3$Co${}_2$O${}_6$

Abstract

The low-temperature structure of the frustrated spin-chain compound Ca${}_3$Co${}_2$O${}_6$ is determined by the ground state of the 2D Ising model on the triangular lattice. At high-temperatures it transforms to the honeycomb magnetic structure. It is shown that the crossover between the two magnetic structures at 12 K arises from the entropy accumulated in the disordered chains. This interpretation is in an agreement with the experimental data. General rules for for the phase diagram of frustrated Ising chain compounds are formulated.

4 pages, 2 figures

Cited by in corpus (3)

• The nature of the magnetic order in Ca3Co2O6
• Incommensurate magnetic ground state revealed by RXS in the frustrated spin system Ca3Co2O6
• Dynamics of magnetization in frustrated spin-chain systems: Ca${}_3$Co${}_2$O${}_6$