铜赝硫属化物CuNCN的磁不均匀性
Magnetic inhomogeneity in the copper pseudochalcogenide CuNCN
摘要：
铜碳二亚胺（CuNCN）是氧化铜的一种几何学上受挫折的氮基类似物，其磁性仍然不明确。在这里，我们采用了本地探针技术的组合，包括$^{63,\, 65}$铜核四极共振，$^{13}$ C核磁共振和μ子自旋旋转表明，磁基态的铜$^{2+}$（$S=1/2$）自旋冻结和无序。此外，这些补充实验明确地建立了在$T_h=80$ K的本征非均匀磁态的开始。在$T_h$以下，低温冷冻成分与残余的高温动力成分共存，直到$T_l = 20$ K，后者最终不再存在。基于这两个组件的内部磁场的缩放，我们得出结论，这两个组件共存的微观水平。
英文摘要：
Copper carbodiimide, CuNCN, is a geometrically frustrated nitrogen-based analogue of cupric oxide, whose magnetism remains ambiguous. Here, we employ a combination of local-probe techniques, including $^{63,\, 65}$Cu nuclear quadrupole resonance, $^{13}$C nuclear magnetic resonance and muon spin rotation to show that the magnetic ground state of the Cu$^{2+}$ ($S=1/2$) spins is frozen and disordered. Moreover, these complementary experiments unequivocally establish an onset of intrinsically inhomogeneous magnetic state at $T_h=80$ K. Below $T_h$, the low-temperature frozen component coexist with the remnant high-temperature dynamical component down to $T_l = 20$ K, where the latter finally ceases to exist. Based on a scaling of internal magnetic fields of both components we conclude that the two components coexist on a microscopic level.
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