Abstract

The recent progress in the investigation of both static and dynamic spin correlations in the cuprate oxides is reviewed. The neutron scattering experiments from the single crystals of undoped cuprate oxides revealed that the magnetic properties are essentially interpreted by the quantum two dimensional Heisenberg antiferromagnetic model. The doping of charge significantly modifies not only spin correlations but spin fluctuations. In addition, the persistence of the antiferromagnetic spin correlations in the superconducting phase suggests an intimate connection between antiferromagnetism and the mechanism of novel high temperature superconductivity in the cuprate oxides.

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