Magnetic inhomogeneity in the copper pseudochalcogenide CuNCNстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 сентября 2018 г.
Аннотация:Copper carbodiimide, CuNCN, is a geometrically frustrated nitrogen-based analog of cupric oxide, whose magnetism remains ambiguous. Here, we employ a combination of local-probe techniques, including (CU)-C-63,65 nuclear quadrupole resonance, C-13 nuclear magnetic resonance, and muon spin rotation to show that the magnetic ground state of the Cu2+ (S = 1/2) spins is frozen and disordered. Moreover, these complementary experiments unequivocally establish the onset of an intrinsically inhomogeneous magnetic state at T-h = 80 K. Below T-h, the low-temperature frozen component coexists with the remnant high-temperature dynamical component down to T-1 = 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.