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APS » Journals » Phys. Rev. B » Volume 45 » Issue 13
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Phys. Rev. B 45, 7430–7435 (1992)

Néel transition and sublattice magnetization of pure and doped La2CuO4

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B. Keimer
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

A. Aharony
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
School of Physics Astronomy, Tel Aviv University, Tel Aviv 69978, Israel

A. Auerbach
Department of Physics, Boston University, Boston, Massachusetts 02215

R. J. Birgeneau and A. Cassanho
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

Y. Endoh
Department of Physics, Tohoku University, Sendai 980, Japan

R. W. Erwin
National Institute of Standards and Technology, Gaithersburg, Maryland 20899

M. A. Kastner
Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

G. Shirane
Brookhaven National Laboratory, Upton, New York 11973

Received 12 August 1991; published in the issue dated 1 April 1992

We have measured the sublattice magnetization of stoichiometric La2CuO4 (TN=325 K) and La2Cu0.95Zn0.05O4 (TN=157 K). We discuss the data for La2CuO4 and other lamellar copper oxides in terms of the quantum Heisenberg model including weak XY anisotropy and interlayer coupling. Spin-wave theory and a generalized Schwinger-boson mean-field theory are used to predict the ordered moment as a function of temperature without adjustable parameters. We also discuss the influence of different dopants on the Néel temperature and sublattice magnetization.

© 1992 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.45.7430
DOI:
10.1103/PhysRevB.45.7430
PACS:
75.50.Ee, 74.70.Vy, 74.70.Hk
 
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