Structural, Mössbauer, and Raman studies of the (Y,Ce)2Sr2Cu2FeO8+y compound

M. Pissas, G. Kallias, N. Poulakis, D. Niarchos, A. Simopoulos, and E. Liarokapis
Phys. Rev. B 52, 10610 – Published 1 October 1995
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Abstract

The crystal structure and physical properties for (Y,Ce)2Sr2Cu2FeO8+y compound are reported using Rietveld-refinement of x-ray powder-diffraction data, dc magnetic susceptibility, Mössbauer, and Raman spectroscopy measurements. Mössbauer data can be analyzed with three components. Component A is attributed to Fe3+ (S=5/2) ions in the Cu(2) site. Component B is attributed to Fe3+ (S=3/2) ions in the Cu(1) plane and appears only in the oxygen saturated sample. For the reduced sample, component B transforms to component Dr, which has a lower oxygen coordination number with respect to that of component B. The Raman lines are assigned to definite atomic vibrations in close comparison with other compounds of similar structure.

  • Received 10 May 1995

DOI:https://doi.org/10.1103/PhysRevB.52.10610

©1995 American Physical Society

Authors & Affiliations

M. Pissas, G. Kallias, N. Poulakis, D. Niarchos, and A. Simopoulos

  • Institute of Materials Science, National Centre for Scientific Research Demokritos, 153 10 Agia Paraskevi, Attiki, Greece

E. Liarokapis

  • Department of Physics, National Technical University of Athens, 157 80 Athens, Greece

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Vol. 52, Iss. 14 — 1 October 1995

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