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Spin correlations and magnetic order in nonsuperconducting Nd(2-x)Ce(x)CuO(4+/-delta).

Authors
  • Mang, P K
  • Vajk, O P
  • Arvanitaki, A
  • Lynn, J W
  • Greven, M
Type
Published Article
Journal
Physical review letters
Publication Date
Jul 09, 2004
Volume
93
Issue
2
Pages
27002–27002
Identifiers
PMID: 15323942
Source
Medline
License
Unknown

Abstract

We report quantitative neutron scattering measurements of the evolution with doping of the Néel temperature, the antiferromagnetic correlations, and the ordered moment of as-grown, nonsuperconducting Nd(2-x)Ce(x)CuO(4+/-delta) (0</=x</=0.18). The instantaneous correlation length can be effectively described by our quantum Monte Carlo calculations for the randomly site-diluted nearest-neighbor spin-1/2 square-lattice Heisenberg antiferromagnet. However, quantum fluctuations have a stronger effect on the ordered moment, which decreases more rapidly than for the quenched-disorder model.

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