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, Lynn Schneemeyer

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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

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X ray spectroscopy
Magnetic susceptibility
X ray powder diffraction
Electron microscopy
magnetic permeability
cuprates
electron microscopy
x rays
Temperature
electrical resistivity
diffraction
spectroscopy
temperature

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Cava, R. J., Zandbergen, H. W., Ramirez, A. P., Takagi, H., Chen, C. T., Krajewski, J. J., ... Schneemeyer, L. (1993). LaCuO25+x and YCuO2.5+x delafossites: Materials with triangular Cu2+δ planes. Journal of Solid State Chemistry, 104(2), 437-452. https://doi.org/10.1006/jssc.1993.1179
Cava, R. J. ; Zandbergen, H. W. ; Ramirez, A. P. ; Takagi, H. ; Chen, C. T. ; Krajewski, J. J. ; Peck, W. F. ; Waszczak, J. V. ; Meigs, G. ; Roth, R. S. ; Schneemeyer, Lynn. / LaCuO25+x and YCuO2.5+x delafossites : Materials with triangular Cu2+δ planes. In: Journal of Solid State Chemistry. 1993 ; Vol. 104, No. 2. pp. 437-452.
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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 Lynn Schneemeyer",
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Cava, RJ, Zandbergen, HW, Ramirez, AP, Takagi, H, Chen, CT, Krajewski, JJ, Peck, WF, Waszczak, JV, Meigs, G, Roth, RS & Schneemeyer, L 1993, 'LaCuO25+x and YCuO2.5+x delafossites: Materials with triangular Cu2+δ planes', Journal of Solid State Chemistry, vol. 104, no. 2, pp. 437-452. https://doi.org/10.1006/jssc.1993.1179

LaCuO25+x and YCuO2.5+x delafossites : Materials with triangular Cu2+δ planes. / Cava, R. J.; Zandbergen, H. W.; Ramirez, A. P.; Takagi, H.; Chen, C. T.; Krajewski, J. J.; Peck, W. F.; Waszczak, J. V.; Meigs, G.; Roth, R. S.; Schneemeyer, Lynn.

In: Journal of Solid State Chemistry, Vol. 104, No. 2, 01.01.1993, p. 437-452.

Research output: Contribution to journalArticle

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

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AU - Cava, R. J.

AU - Zandbergen, H. W.

AU - Ramirez, A. P.

AU - Takagi, H.

AU - Chen, C. T.

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AU - Waszczak, J. V.

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AU - Schneemeyer, Lynn

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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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Cava RJ, Zandbergen HW, Ramirez AP, Takagi H, Chen CT, Krajewski JJ et al. LaCuO25+x and YCuO2.5+x delafossites: Materials with triangular Cu2+δ planes. Journal of Solid State Chemistry. 1993 Jan 1;104(2):437-452. https://doi.org/10.1006/jssc.1993.1179