2011/05/31 by A. Zorko, P. Jeglič, Anton Potočnik +13
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Electron paramagnetic resonance #Frustration #Liquid nitrogen #Magnetic and transport properties of perovskites and related materials #Magnetism #Materials science #Muon #Muon spin spectroscopy #Nitrogen #Nuclear magnetic resonance #Nuclear physics #Oxide #Physics #Physics of Superconductivity and Magnetism #Relaxation (psychology) #Spin (aerodynamics) #Superconductivity #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.107.047208
published as Phys. Rev. Lett. 107, 047204 (2011) · 4 pages + 1 page of supplementary information, accepted for publication in PRL
arxiv created 2011/06/30 · openalex publication_date 2011/07/22 · arxiv updated 2011/07/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We have investigated the magnetic properties of CuNCN, the first nitrogen-based analog 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 the lowest temperatures. However, a large enhancement of spin correlations and an 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.