LaCuO25+x and YCuO2.5+x delafossites: Materials with triangular Cu2+δ planes

R. J. Cava, H. W. Zandbergen, A. P. Ramirez, H. Takagi, C. T. Chen, J. J. Krajewski, W. F. Peck, J. V. Waszczak, G. Meigs, R. S. Roth, L. F. Schneemeyer

Research output: Contribution to journalArticlepeer-review

133 Scopus citations

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.

Original languageEnglish
Pages (from-to)437-452
Number of pages16
JournalJournal of Solid State Chemistry
Volume104
Issue number2
DOIs
StatePublished - 1 Jan 1993

Fingerprint Dive into the research topics of 'LaCuO<sub>25+x</sub> and YCuO<sub>2.5+x</sub> delafossites: Materials with triangular Cu<sup>2+δ</sup> planes'. Together they form a unique fingerprint.

Cite this