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

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

145 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 (US)
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
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1006/jssc.1993.1179

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@article{9b9709e6690049258afcbf5dc4e219ed,

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 (US)",

volume = "104",

pages = "437--452",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "2",

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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.

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U2 - 10.1006/jssc.1993.1179

DO - 10.1006/jssc.1993.1179

M3 - Article

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SN - 0022-4596

VL - 104

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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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