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VOLUME 52 (1990) | ISSUE 9 | PAGE 1100
Interpretation of the La2CuO4+δ phase diagram
The phase diagram for a solution of oxygen in La2Cu04, including the region of phase stratification, is interpreted on the basis of a nematic spin order parameter. In this interpretation, the small values of the structural changes in the lattice can be explained by the small value of the magnetic-anisotropy energy.