Crossref journal-article
AIP Publishing
Journal of Applied Physics (317)
Abstract

A number of models for high-temperature superconductivity in the layered cuprate perovskites require strong antiferromagnetic superexchange interactions between Cu atoms. The existence of such interactions in La2CuO4−y has previously been demonstrated. In this paper a review is given of recent neutron scattering work performed at Brookhaven studying antiferromagnetism in RBaCu3O6+x with R=Y, Nd. Measurements on ceramic samples with a range of oxygen concentrations have shown that three-dimensional antiferromagnetic ordering of the Cu spins occurs throughout the nonsuperconducting tetragonal phase, corresponding to 0≤x≲0.4. Near x∼0 the Cu2+ atoms in the CuO2 layers form a simple Néel lattice, and there is no ordering of the nonmagnetic Cu1+ atoms in the ‘‘chain’’ sites. With increasing oxygen content some of the Cu1+ atoms are converted to Cu2+, which leads to frustration of the interplanar coupling and eventually to a second type of ordering. Very recently, large single crystals of YBa2Cu3O6+x have been grown, making possible inelastic scattering studies of magnetic excitations. Spin waves within the CuO2 planes are observed to have a velocity ≳0.5 eV Å.

Bibliography

Tranquada, J. M. (1988). Antiferromagnetism in YBa2Cu3O6+x (invited). Journal of Applied Physics, 64(10), 6071–6074.

Authors 1
  1. John M. Tranquada (first)
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Dates
Type When
Created 23 years ago (July 26, 2002, 8:55 a.m.)
Deposited 1 year, 6 months ago (Feb. 4, 2024, 3:58 a.m.)
Indexed 1 year, 6 months ago (Feb. 4, 2024, 12:02 p.m.)
Issued 36 years, 9 months ago (Nov. 15, 1988)
Published 36 years, 9 months ago (Nov. 15, 1988)
Published Print 36 years, 9 months ago (Nov. 15, 1988)
Funders 0

None

@article{Tranquada_1988, title={Antiferromagnetism in YBa2Cu3O6+x (invited)}, volume={64}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.342125}, DOI={10.1063/1.342125}, number={10}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Tranquada, John M.}, year={1988}, month=nov, pages={6071–6074} }