Lacuo25+X and Ycuo2.5+X Delafossites: Materials with Triangular Cu2+Δ Planes

Authors

Robert J. Cava, Princeton UniversityFollow
H. W. Zandbergen, Delft University of TechnologyFollow
A. P. Ramirez, National Institute of Standards and TechnologyFollow
Hidenori Takagi, University of StuttgartFollow
C. T. Chen, Lucent
J. J. Krajewski, Los Alamos National LaboratoryFollow
W. F. Peck, LucentFollow
Joseph V. Waszczak, University of WashingtonFollow
G. Meigs, Lucent
Robert S. Roth, National Institute of Standards and Technology
Lynn Schneemeyer, Montclair State UniversityFollow

Document Type

Article

Publication Date

1-1-1993

Abstract

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.

DOI

10.1006/jssc.1993.1179

Montclair State University 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.
https://digitalcommons.montclair.edu/chem-biochem-facpubs/405