Cu¹⁺-haltige Doppeloxide mit seltenen Erdmetallen¹

Synthesis and magnetic properties of ALnO2 (A=Cu or Ag; Ln=rare earths) with the delafossite structure

“…Haas et al. reported the preparation of CuLnO 2 (Ln = La, Pr, Nd, Sm, and Eu) [7]. Oxygen excess in delafossite structures was reported in the CuLnO 2 family, where several researchers have demonstrated the possibility to insert oxygen atoms in the Cu layer, namely in the center of Cu triangles [8][9][10].…”

The Fine Structure of YCuO2+x Delafossite Determined by Synchrotron Powder Diffraction and Electron Microscopy

“…1 and 2 in (1)). These double-layer (¸nO }Cu) sandwiches with a thickness of 5.6 A s can be stacked in di!erent ways, creating a number of polytypes (2,3). LaCuO for example shows a 3R stacking (2) while YCuO has a 2H stacking (3).…”

Control on the Copper Valence and Properties by Oxygen Content Adjustment in the LaCuO3−System (0≤y≤0.5)

“…04y40.5 (26,27). Finally, below the oxidation state of Cu(#II) the oxygen defect perovskite structure is not stable anymore, but the synthesis starting from La O and Cu O results under a nitrogen atmosphere in the LaCuO delafossite (28). The delafossite structure, consisting of triangular planes of O-Cu(#I)-O sticks, remains stable even upon oxidizing the copper to valences exceeding #II (29).…”