Structural aspects of the phase separation in La2CuO4.032

C. Chaillout; J. Chenavas; S. W. Cheong; Z. Fisk; M. S. Lehmann; M. Marezio; B. Morosin; J. E. Schirber

doi:10.1016/0921-4534(89)90915-5

Structural aspects of the phase separation in La₂CuO_4.032

C. Chaillout, J. Chenavas, S. W. Cheong, Z. Fisk, M. S. Lehmann, M. Marezio, B. Morosin, J. E. Schirber

School of Arts and Sciences, New High Energy Theory Center

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

19 Scopus citations

Abstract

The average structure of superconducting La₂CuO_4.032 has been determined by single-crystal neutron diffraction data. The excess oxygen is located between two adjacent LaO layers. Its presence distorts the apical-oxygen sublattice in such a way that a short OO bond is formed (1.64Å). By scanning several hkl reflections, we have confirmed that a phase separation occurs below room temperature. The peaks of one phase are in agreement with the space group Cmca and the unit cell proposed by Jorgensen et al. and Cox et al.. However, a monoclinic unit cell is needed to index the second phase reflections.

Original language	English (US)
Pages (from-to)	57-58
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	162-164
Issue number	PART 1
DOIs	https://doi.org/10.1016/0921-4534(89)90915-5
State	Published - Dec 1989

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/0921-4534(89)90915-5

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title = "Structural aspects of the phase separation in La2CuO4.032",

abstract = "The average structure of superconducting La2CuO4.032 has been determined by single-crystal neutron diffraction data. The excess oxygen is located between two adjacent LaO layers. Its presence distorts the apical-oxygen sublattice in such a way that a short OO bond is formed (1.64{\AA}). By scanning several hkl reflections, we have confirmed that a phase separation occurs below room temperature. The peaks of one phase are in agreement with the space group Cmca and the unit cell proposed by Jorgensen et al. and Cox et al.. However, a monoclinic unit cell is needed to index the second phase reflections.",

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doi = "10.1016/0921-4534(89)90915-5",

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T1 - Structural aspects of the phase separation in La2CuO4.032

AU - Chaillout, C.

AU - Chenavas, J.

AU - Cheong, S. W.

AU - Fisk, Z.

AU - Lehmann, M. S.

AU - Marezio, M.

AU - Morosin, B.

AU - Schirber, J. E.

PY - 1989/12

Y1 - 1989/12

N2 - The average structure of superconducting La2CuO4.032 has been determined by single-crystal neutron diffraction data. The excess oxygen is located between two adjacent LaO layers. Its presence distorts the apical-oxygen sublattice in such a way that a short OO bond is formed (1.64Å). By scanning several hkl reflections, we have confirmed that a phase separation occurs below room temperature. The peaks of one phase are in agreement with the space group Cmca and the unit cell proposed by Jorgensen et al. and Cox et al.. However, a monoclinic unit cell is needed to index the second phase reflections.

AB - The average structure of superconducting La2CuO4.032 has been determined by single-crystal neutron diffraction data. The excess oxygen is located between two adjacent LaO layers. Its presence distorts the apical-oxygen sublattice in such a way that a short OO bond is formed (1.64Å). By scanning several hkl reflections, we have confirmed that a phase separation occurs below room temperature. The peaks of one phase are in agreement with the space group Cmca and the unit cell proposed by Jorgensen et al. and Cox et al.. However, a monoclinic unit cell is needed to index the second phase reflections.

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IS - PART 1

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Structural aspects of the phase separation in La₂CuO_4.032

Abstract

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