Insensitivity of magnetic anomalies in Sr3NiPtO6 to positive and negative pressures

TL;DR

This study shows that the magnetic properties of Sr3NiPtO6 are unaffected by both positive and negative pressures, indicating robust magnetic anomalies despite chemical substitutions and external pressure.

Contribution

It demonstrates the insensitivity of magnetic anomalies in Sr3NiPtO6 to external and chemical pressures, highlighting the robustness of its magnetic frustration.

Findings

Magnetic properties remain unchanged with Ba substitution.

Magnetic anomalies are unaffected under external pressure up to 10 kbar.

Spin-liquid-like behavior persists across all studied conditions.

Abstract

The compound, Sr3NiPtO6, belonging to a K4CdCl6-type rhombohedral structure, has been reported not to exhibit magnetic ordering at least down to 1.8 K, despite a relatively large value of paramagnetic Curie temperature. This is attributable to geometrical frustration. Here we report the results of our efforts to gradually replace Sr by Ba and to probe the influence of positive (external) and negative (chemical) pressure on the magnetic behavior of this compound. In the Ba substituted series, single phase is formed up to x= 1.0 with Ba substituting for Sr. The magnetic properties of the parent compound in the entire temperature range of investigation are not influenced at all in any of the compositions studied as well as under external pressure (investigated up to 10 kbar). Spin-liquid-like heat-capacity behavior (finite linear term) is observed even in Ba substituted specimens. Thus, the magnetic anomalies of this compound are quite robust.