The decisive role of magnetic anisotropy in honeycomb layered Li${}_3$Ni${}_2$SbO${}_6$ and Na${}_3$Ni${}_2$SbO${}_6$

Abstract

The decisive role of magnetic anisotropy even in systems with small anisotropy is illustrated for the honeycomb-layered antiferromagnets The decisive role of magnetic anisotropy in honeycomb layered Li${}_3$Ni${}_2$SbO${}_6$ and Na${}_3$Ni${}_2$SbO${}_6$ with $A$ = Li and Na. Both systems evolve long range magnetic order below $T_{\mathrm{N}}$ = 14 and 16.5~K, respectively. The magnetic phase diagrams obtained from static magnetisation studies up to 15~T imply competing antiferromagnetic phases and a tricritical point at $T_{\mathrm{N}}$. The phase boundaries are visible in the dynamic response of the antiferromagnetic resonance modes, too, which investigation by means of high frequency/high field electron spin resonance enables precise determination of magnetic anisotropy. The anisotropy gap amounts to $\Delta =360\pm 2$~GHz in Na${}_3$Ni${}_2$SbO${}_6$ while in Li${}_3$Ni${}_2$SbO${}_6$ orthorhombicity is associated with $\Delta =198\pm 4$ and $218\pm 4$~GHz. Above $T_{\mathrm{N}}$, the data imply short-range antiferromagnetic order up to at least 80~K. The data suggest a crucial role of anisotropy for selecting the actual spin structure at $B=0$~T.

References in corpus (2)

• Static and Dynamic Magnetic Response of Fragmented Haldane-like Spin Chains in Layered Li3Cu2SbO6
• Magnetic anisotropy and the phase diagram of chiral MnSb2O6

Cited by in corpus (1)

• Featureless quantum paramagnet with frustrated criticality and competing spiral magnetism on spin-1 honeycomb lattice magnet