Anomalous temperature evolution of the internal magnetic field distribution in the charge-ordered triangular antiferromagnet AgNiO2

Abstract

Zero-field muon-spin relaxation measurements of the frustrated triangular quantum magnet AgNiO2 are consistent with a model of charge disproportionation that has been advanced to explain the structural and magnetic properties of this compound. Below an ordering temperature of T_N=19.9(2) K we observe six distinct muon precession frequencies, due to the magnetic order, which can be accounted for with a model describing the probable muon sites. The precession frequencies show an unusual temperature evolution which is suggestive of the separate evolution of two opposing magnetic sublattices.

4 pages, 3 figures

References in corpus (7)

• Spin-polarized muons in condensed matter physics
• Triangular Antiferromagnets
• Orbital ordering in frustrated Jahn-Teller systems
• Orbital degeneracy as a source of frustration in LiNiO${}_2$
• Orbital degeneracy removed by charge order in triangular antiferromagnet AgNiO2
• Role of Orbitals in the Physics of Correlated Electron Systems
• Thermodynamic and magnetic properties of the layered triangular magnet NaNiO2

Cited by in corpus (4)

• Charge disproportionation and collinear magnetic order in the frustrated triangular antiferromagnet AgNiO2
• Novel magnetism on a honeycomb lattice in a-RuCl3 studied by muon spin rotation
• Effect of magnesium doping on the orbital and magnetic order in LiNiO2
• Magnetic Microphase Inhomogeneity as a Thermodynamic Precursor of Ground State Phase Separation in Weakly Coupled Spin-$\frac{3}{2}$ Chains