Controversial magnetism in CuNCN, a nitrogen-containing analog of CuO
Copper oxides exhibit numerous fascinating phenomena and exotic electronic ground states, e.g., high-temperature superconductivity and quantum magnetism. Substitution of O2- with (NCN)2- anion complex is an important step in tailoring physical properties of copper compounds. The neutron scattering studies on recently synthesized CuNCN failed to detect magnetic reflections, while muon spin relaxation reveal freezing of the Cu2+ (S=1/2) magnetic moments. Still, recent study (PRB 85 224431 (2012)) claims that that the system establish long-range magnetic order. Our latest nonpolarized inelastic neutron scattering experiment reveals that the temperature dependence of quasi-elastic excitations at low-Q shows anomalies that coincide with the muon experiment. To establish if these excitations are indeed magnetic and if they originate from ordered phase, we propose polarized inelastic neutron scattering experiment
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Zaharko; ARCON Denis; PREGELJ Matej and WILDES Andrew. (2013). Controversial magnetism in CuNCN, a nitrogen-containing analog of CuO. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1312
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