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Digitale Medien

Neutron diffraction investigation of phase separation in La2CuO4+y single crystals (1996)

Balagurov, A. M. ; Pomyakushin, V. Yu. ; Simkin, V. G. ; [weitere]

Springer

JETP letters 64 (1996), S. 279-284

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Details

ISSN: 1090-6487

Schlagwort(e): 61.12.Ld ; 64.75.+g

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: 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.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1134/1.567184

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