Antiferromagnetism in La2CuO4y

D. Vaknin, S. K. Sinha, D. E. Moncton, D. C. Johnston, J. M. Newsam, C. R. Safinya, and H. E. King, Jr.
Phys. Rev. Lett. 58, 2802 – Published 29 June 1987
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Abstract

Powder neutron diffraction studies of undoped La2CuO4y have revealed new superlattice peaks below ∼220 K. The absence of corresponding x-ray superlattice lines and an observed susceptibility anomaly near 220 K suggest the occurrence of antiferromagnetism. From the magnetic peak intensities we deduce a structure consisting of ferromagnetic sheets of Cu spins alternating along the [100] orthorhombic axis, with the spins aligned along the [001] orthorhombic axis, The low-temperature magnetic moment is approximately 0.5μB/(Cu atom). The tetragonal-orthorhombic transition at 505 K has also been studied.

  • Received 4 May 1987

DOI:https://doi.org/10.1103/PhysRevLett.58.2802

©1987 American Physical Society

Authors & Affiliations

D. Vaknin, S. K. Sinha, D. E. Moncton, D. C. Johnston, J. M. Newsam, C. R. Safinya, and H. E. King, Jr.

  • Corporate Research Laboratories, Exxon Research and Engineering Company, Annandale, New Jersey 08801

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Issue

Vol. 58, Iss. 26 — 29 June 1987

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