Magnetic order and instability in newly synthesized CoSeAs marcasite

TL;DR

This study synthesizes and investigates a new CoSeAs marcasite compound, revealing weak magnetic correlations and potential for unconventional superconductivity due to magnetic instability.

Contribution

It reports the synthesis and experimental characterization of a novel marcasite CoSeAs compound, highlighting its magnetic properties and instability, which are relevant for superconductivity research.

Findings

Weak magnetic correlations below 36.2 K

Modest isotropic exchange interaction

Hints of magnetically unstable environment

Abstract

Marcasite class of compounds provide facile platform to explore novel phenomena of fundamental and technological importance, such as unconventional superconductivity or high performance electrocatalyst. We report the synthesis and experimental investigation of a new marcasite CoSeAs in this letter. Experimental investigation of the new material using neutron scattering measurements reveal weak magnetic correlation of cobalt ions below $T$ = 36.2 K. The modest isotropic exchange interaction between cobalt moments, inferred from random phase approximation analysis, hints of magnetically unstable environment. It is a desirable characteristic to induce unconventional superconductivity via chemical pressure application