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

doi:10.1006/jssc.1993.1179

LaCuO_25+x and YCuO_2.5+x delafossites: Materials with triangular Cu^2+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

Chemistry and Biochemistry

Research output: Contribution to journal › Article › peer-review

146 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 YCuO_2.5+x, 0 ≤ x ≤ 0.05, and LaCuO_25+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 La_2-xSr_xCuO₄, is also reported.

Original language	English
Pages (from-to)	437-452
Number of pages	16
Journal	Journal of Solid State Chemistry
Volume	104
Issue number	2
DOIs	https://doi.org/10.1006/jssc.1993.1179
State	Published - Jun 1993

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@article{b1b45f05bbed45fcb1df8e6ca99545dd,

title = "LaCuO25+x and YCuO2.5+x delafossites: Materials with triangular Cu2+δ planes",

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.",

author = "Cava, \{R. J.\} and Zandbergen, \{H. W.\} and Ramirez, \{A. P.\} and H. Takagi and Chen, \{C. T.\} and Krajewski, \{J. J.\} and Peck, \{W. F.\} and Waszczak, \{J. V.\} and G. Meigs and Roth, \{R. S.\} and Schneemeyer, \{L. F.\}",

year = "1993",

month = jun,

doi = "10.1006/jssc.1993.1179",

language = "English",

volume = "104",

pages = "437--452",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "2",

}

TY - JOUR

T1 - LaCuO25+x and YCuO2.5+x delafossites

T2 - Materials with triangular Cu2+δ planes

AU - Cava, R. J.

AU - Zandbergen, H. W.

AU - Ramirez, A. P.

AU - Takagi, H.

AU - Chen, C. T.

AU - Krajewski, J. J.

AU - Peck, W. F.

AU - Waszczak, J. V.

AU - Meigs, G.

AU - Roth, R. S.

AU - Schneemeyer, L. F.

PY - 1993/6

Y1 - 1993/6

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0039618117

U2 - 10.1006/jssc.1993.1179

DO - 10.1006/jssc.1993.1179

M3 - Article

AN - SCOPUS:0039618117

SN - 0022-4596

VL - 104

SP - 437

EP - 452

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

IS - 2

ER -

LaCuO_25+x and YCuO_2.5+x delafossites: Materials with triangular Cu^2+δ planes

Abstract

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