Unconventional Magnetism in a Nitrogen-Based Analogue of Cupric Oxide
A. Zorko, P. Jegli\v{c}, A. Poto\v{c}nik, D. Ar\v{c}on, A., Bal\v{c}ytis, Z. Jagli\v{c}i\'c, X. Liu, A. L. Tchougr\'eeff, and R., Dronskowski
TL;DR
This study explores the magnetic behavior of CuNCN, a nitrogen-based analogue of CuO, revealing absence of classical magnetic order and signs of inhomogeneous magnetism due to geometrical frustration.
Contribution
It provides the first investigation into the magnetic properties of CuNCN, highlighting its unique spin dynamics and frustration-induced phenomena.
Findings
No classical magnetic order down to lowest temperatures
Enhanced spin correlations below 80 K
Presence of inhomogeneous magnetism
Abstract
We have investigated the magnetic properties of CuNCN, the first nitrogen-based analogue of cupric oxide, CuO. Our muon spin relaxation, nuclear magnetic resonance and electron spin resonance studies reveal that classical magnetic ordering is absent down to lowest temperatures. However, large enhancement of spin correlations and unexpected inhomogeneous magnetism have been observed below 80 K. We attribute this to a peculiar fragility of the electronic state against weak perturbations due to geometrical frustration, which selects between competing spin-liquid and more conventional frozen states.
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