Abstract
La2CuO4+y single crystals with y=0.03 and 0.04 are investigated with a high-resolution neutron diffractometer in the temperature range 10<T<293 K. Althouogh the excess oxygen concentration y falls in the range of the dissolution gap, the crystal with y=0.03 does not undergo phase separation (PS)—the oxygen distribution in this crystal remains uniform over the entire experimental temperature interval. Macroscopic PS is observed in the crystal with y=0.04. An analysis of the dependence of the widths of the reflection orders on the interplanar separation gives the sizes of the coherent regions of the two coexisting phases: (970±30) Å in the direction of the tetragonal axis c and (1460 645) Å in the basal plane.
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References
J. D. Jorgensen, B. Dabrowski, S. Pei et al., Phys. Rev. B 38, 11337 (1988).
A. A. Zakharov, A. A. Nikonov, O. E. Parfenov et al., Physica C 223, 157 (1994).
A. A. Zakharov and A. A. Nikonov, JETP Lett. 60, 348 (1994).
V. Yu. Pomjakushin, A. A. Zakharov, A. Amato et al., JINR Commun., E14-96-16, Dubna, 1996.
P. G. Radaelli, J. D. Jorgensen, R. Kleb et al., Phys. Rev. 49, 6239 (1994).
J. Ryder, P. A. Midgley, R. Exley et al., Physica C 173, 9 (1991).
V. L. Aksenov, A. M. Balagurov et al., Soobshch. OIYaI, R3-96-164, Joint Institute for Nuclear Research, Dubna, 1996.
D. Vaknin, J. L. Zarestky, D. C. Johnston et al., Phys. Rev. B 49, 9057 (1994).
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Pis’ma Zh. Éksp. Teor. Fiz. 64, No. 4, 254–258 (25 August 1996)
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Balagurov, A.M., Pomyakushin, V.Y., Simkin, V.G. et al. Neutron diffraction investigation of phase separation in La2CuO4+y single crystals. Jetp Lett. 64, 279–284 (1996). https://doi.org/10.1134/1.567184
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DOI: https://doi.org/10.1134/1.567184