Abstract
The results on the nonlinear longitudinal response (second order uniform dynamic susceptibility χ2(ω)) of two moderately doped La2CuO4+x single crystals in the temperature region of the phase separation of extra oxygen are reported. Large 2D-fragments (I≈7·103 Å) of stoichiometric La2CuO4 are shown to be responsible for the signal in sample withT ps>-T N≈243 K. The signal of the crystal withT ps<T N≈272 K is due to oxygen-rich phase. Its peculiarities are related either to change and destruction of magnetic ordering in the course of the phase separation or to the ordering of the extra oxygen.
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Lazuta, A.V., Ryzhov, V.A., Larionov, I.I. et al. Second harmonic of magnetization and Cu magnetic system behavior at phase separation in moderately oxygenated single crystals of La2CuO4+x . Appl. Magn. Reson. 12, 275–285 (1997). https://doi.org/10.1007/BF03162194
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DOI: https://doi.org/10.1007/BF03162194