Structure and Magnetism of the mono-layer hydrate Na0.3NiO2 0.7H2O

TL;DR

This study investigates the structure and magnetic properties of a mono-layer hydrate Na0.3NiO2 0.7H2O, revealing differences in magnetic behavior compared to bi-layer hydrate due to increased three-dimensional electronic interactions.

Contribution

It provides new insights into how hydration layers influence the magnetic properties and electronic structure of Na0.3NiO2 compounds.

Findings

Weak ferromagnetism observed in both hydrates

Frequency dependence of AC susceptibility in Ni-BLH not seen in Ni-MLH

Increased 3D electronic character in Ni-MLH alters magnetic behavior

Abstract

The mono-layer hydrate (Ni-MLH) Na0.3NiO2 0.7H2O was synthesized with an average Ni valence close to one in the bi-layer hydrate (Ni-BLH) Na0.3NiO2 1.3H2O. A weak unsaturated ferromagnetism and divergence of the magnetic susceptibilities of field and zero-field cooled samples of both Ni-MLH and Ni-BLH are observed. However, as a result of the increased 3-dimensional electronic and magnetic character present in Ni-MLH a frequency dependence of the AC magnetic susceptibility indicative of the spin glass-like behavior as seen in Ni-BLH was no longer observed in Ni-MLH.