Sodium layer chiral distribution and spin structure of Na${}_2$Ni${}_2$TeO${}_6$ with a honeycomb network

Abstract

The nature of Na ion distribution, diffusion path, and the spin structure of $P2$-type Na${}_2$Ni${}_2$TeO${}_6$ with a Ni honeycomb network has been explored. The nuclear density distribution of Na ions reveals a 2D chiral pattern within Na layers without breaking the original 3D crystal symmetry, which has been achieved uniquely via an inverse Fourier transform (iFT)-assisted neutron diffraction technique. The Na diffusion pathway described by the calculated iso-surface of Na ion bond valence sum (BVS) map is found consistent to a chiral diffusion mechanism. The Na site occupancy and Ni${}^{2+}$ spin ordering were examined in detail with the electron density mapping, neutron diffraction, magnetic susceptibility, specific heat, thermal conductivity and transport measurements. Signatures of both strong incommensurate (ICM) and weak commensurate (CM) antiferromagnetic (AFM) spin ordering were identified in the polycrystalline sample studied, and the CM-AFM spin ordering was confirmed by using a single crystal sample through the $k$-scan in the momentum space corresponding to the AFM peak of ($\frac{1}{2}$, 0, 1).

arXiv comment9 pages, 8 figures

References in corpus (9)

• Superconductivity Phase Diagram of Na(x)CoO(2).1.3H(2)O
• Large enhancement of the thermopower in Na${}_x$CoO${}_2$ at high Na doping
• Magnetic ordering and spin waves in $\mathbf{N}{\mathbf{a}}_{0.82}\mathbf{Co}{\mathbf{O}}_2$
• Magnetic properties of the honeycomb oxide Na${}_2$Co${}_2$TeO${}_6$
• 1D to 2D Na Ion Diffusion Inherently Linked to Structural Transitions in Na${}_{0.7}$CoO${}_2$
• Direct link between low temperature magnetism and high temperature sodium order in NaxCoO2
• Melting of the Na layers in solid Na0.8CoO2
• Ferrimagnetic ordering and spin entropy of field-dependent intermediate spins in Na0.82CoO2
• Revisiting the crystal electric field of P2-NaxCoO2 for the intermediate spin state of Co3+

Cited by in corpus (9)

• Honeycomb Layered Oxides: Structure, Energy Storage, Transport, Topology and Relevant Insights
• Static and dynamic magnetic properties of honeycomb lattice antiferromagnets Na${}_2{M}_2$TeO${}_6$, $M$ = Co and Ni
• Temperature Dependent Na-ion Conduction and its Pathways in the Crystal Structure of the Layered Battery Material Na${}_2$Ni${}_2$TeO${}_6$
• Magnetism of the 2D honeycomb layered Na2Ni2TeO6 compound driven by intermediate Na-layer crystal-structure
• Magnetism and Ion Diffusion in Honeycomb Layered Oxide K${}_2$Ni${}_2$TeO${}_6$: First Time Study by Muon Spin Rotation & Neutron Scattering
• Unveiling Structural Disorders in Honeycomb Layered Oxide: $\mathrm{N}{\mathrm{a}}_2\mathrm{N}{\mathrm{i}}_2\mathrm{Te}{\mathrm{O}}_6$
• Implications of Coordination Chemistry to Cationic Interactions in Honeycomb Layered Nickel Tellurates
• Advances in honeycomb layered oxides: Part I -- Syntheses and Characterisations of Pnictogen- and Chalcogen-Based Honeycomb Layered Oxides
• Zigzag magnetic order in a novel tellurate compound Na${}_{4-\delta }$NiTeO${}_6$ with $S$ = 1 chains