Anisotropic susceptibility of the geometrically frustrated spin-chain compound Ca3Co2O6

TL;DR

This study provides the first quantitative analysis of magnetic anisotropy in Ca3Co2O6, a geometrically frustrated spin-chain compound, revealing how uniaxial anisotropy influences its unique magnetic properties.

Contribution

It offers the first direct susceptibility measurements on single crystals to quantify the magnetic anisotropy of Ca3Co2O6, advancing understanding of its frustrated magnetic behavior.

Findings

Quantitative anisotropy data obtained from single-crystal susceptibility measurements

Clarification of the role of uniaxial anisotropy in magnetic properties

Insights into the interplay of ferromagnetic and antiferromagnetic couplings

Abstract

Ca3Co2O6 is a system exhibiting a series of fascinating properties, including magnetization plateaus and remarkably slow dynamics at low-T. These properties are intimately related to the geometrical frustration, which results from a particular combination of features: (i) the chains are arranged on a triangular lattice; (ii) there is a large uniaxial anisotropy; (iii) the intrachain and interchain couplings are ferromagnetic and antiferromagnetic, respectively. The uniaxial anisotropy is thus an issue of crucial importance for the analysis of the physical properties of Ca3Co2O6. However, it turns out that no precise investigation of this magnetic anisotropy has been performed so far. On the basis of susceptibility data directly recorded on single crystals, the present study reports on quantitative information about the anisotropy of Ca3Co2O6.