Lacuo25+X and Ycuo2.5+X Delafossites: Materials with Triangular Cu2+Δ Planes
The YCuO2 and LaCuO2 delafossites consist of alternating triangular planes of Ln3+ octahedra and O-Cu1+-O sticks. Here it is shown that under a limited set of conditions they may be oxidized to form new delafossite-derived phases YCuO2.5+x, 0 ≤ x ≤ 0.05, and LaCuO25+x, 0.07 ≤ x ≤ 0.18. Electron microscopy and powder X-ray diffraction are employed to characterize the resulting structures. Temperature-dependent resistivities and magnetic susceptibilities are reported. Characterization by soft X-ray photoabsorbtion spectroscopy, which shows them to be electronically unlike cuprates such as La2-xSrxCuO4, is also reported.
MSU Digital Commons Citation
Cava, Robert J.; Zandbergen, H. W.; Ramirez, A. P.; Takagi, Hidenori; Chen, C. T.; Krajewski, J. J.; Peck, W. F.; Waszczak, Joseph V.; Meigs, G.; Roth, Robert S.; and Schneemeyer, Lynn, "Lacuo25+X and Ycuo2.5+X Delafossites: Materials with Triangular Cu2+Δ Planes" (1993). Department of Chemistry and Biochemistry Faculty Scholarship and Creative Works. 405.