Hostname: page-component-54dcc4c588-ff9ft Total loading time: 0 Render date: 2025-10-05T14:43:37.846Z Has data issue: false hasContentIssue false
  • English
  • Français

Structural Aspects of the Phase Separation in La2CuO4.032

Published online by Cambridge University Press:  28 February 2011

C. Chailloutl ,
P. Bordetl ,
J. Chenavasl ,
S.W. Cheong ,
Z. Fisk ,
M. Mareziou ,
B. Morosin  and
J.E. Schirber
C. Chailloutl
Affiliation:
Laboratoire de Cristallographie, CNRS, associé à l'Université J. Fourier, 166X, 38042 Grenoble cedex, France
P. Bordetl
Affiliation:
Laboratoire de Cristallographie, CNRS, associé à l'Université J. Fourier, 166X, 38042 Grenoble cedex, France
J. Chenavasl
Affiliation:
Laboratoire de Cristallographie, CNRS, associé à l'Université J. Fourier, 166X, 38042 Grenoble cedex, France
S.W. Cheong
Affiliation:
AT&T Bell Laboratories, Murray Hill, NJ 07974, USA
Z. Fisk
Affiliation:
Los Alamos National Laboratory, NM 87545, USA
M. Mareziou
Affiliation:
Laboratoire de Cristallographie, CNRS, associé à l'Université J. Fourier, 166X, 38042 Grenoble cedex, France AT&T Bell Laboratories, Murray Hill, NJ 07974, USA
B. Morosin
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
J.E. Schirber
Affiliation:
Sandia National Laboratories, Albuquerque, NM 87185, USA
Get access

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 O‐O bond is formed (1.64Å). By scanning several hkl reflexions, we have confirmed that a phase separation occurs below room temperature. The peaks of the phases are in agreement with the unit cells proposed by Jorgensen et al. and Zolliker et al. However, Cmca seems to be the correct space group for both phases. La2CuO4+მ and the Ni counterpart are, thus, not isostructural.

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

1 Chaillout, C., Cheong, S.W., Fisk, Z., Lehmann, M.S., Marezio, M., Morosin, B. and Schirber, J.E., Physica C 158 , 183 (1989).Google Scholar
2 Jorgensen, J. D., Dabrowski, B., Shiyou Pei, , Hinks, D.G., Soderholm, L., Morosin, B., Schirber, J.E., Venturini, E.L. and Ginley, D.S., Phys. Rev. B 38, 11337 (1988)Google Scholar
3Zolliker et al., to be publishedGoogle Scholar
4 Jorgensen, J.D., Dabrowski, B., Shiyou Pei, , Richards, D.R. and Hinks, D.G., to appear in Phys. Rev. B (1989)Google Scholar
5Hundley et al., to be published (1989)Google Scholar