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Investigations of the lanthanum-europium-copper-oxygen system by X-ray powder diffraction, thermal analysis and europium-151 Mössbauer spectroscopy

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Abstract

Lanthanum-europium-copper oxides of composition La2−x Eu x CuO4 with structures related to those of the high temperature superconducting oxides have been prepared by solid state reactions between the component oxides in air. The X-ray powder diffraction data demonstrate that an orthorhombic to tetragonal structural transformation occurs at compositions betweenx=0.5 andx=0.8. The151Eu Mössbauer spectra show that europium is present in all phases as Eu3+. Thermal analysis studies in hydrogen show that a two-step reduction process occurs in the lanthanum-europium-copper oxides with the orthorhombic type structure.151Eu Mössbauer spectroscopy shows that the process does not involve the reduction of the lanthanide ion.

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References

  1. K.K. Singh, P. Ganguly and C.N.R. Rao, Mat. Res. Bull. 17 (1982) 493.

    Article  Google Scholar 

  2. C.N.R. Rao and P. Ganguly Current Science 56 (1987) 47.

    Google Scholar 

  3. P. Ganguly and C.N. Rao, J. Solid State Chem, 53 (1984) 193.

    Article  ADS  Google Scholar 

  4. J.G. Bednorz and K.A. Muller, Z. Phys. B 64 (1986) 189.

    Article  Google Scholar 

  5. S. Uchida, H. Takagi, S. Tanaka and K. Kitazawa, Jap. J. Appl. Phys. 26 (1987) L1.

    Article  ADS  Google Scholar 

  6. K. Kishio, K. Kitazawa, S. Kanbe, I. Yasuda, N. Sugii, K. Fueki, H. Takagi and S. Tanaka, Chem. Lett. (1987) 429.

  7. R.J. Cava, R.B. van Dover, B. Batlogg and E.A. Reitman, Phys. Rev. Lett. 59 (1987) 408.

    Article  ADS  Google Scholar 

  8. C. Michel and B. Raveau, Revue de Chimie Minerale 21 (1984) 407.

    Google Scholar 

  9. T. Oguchi, Jap. J. Appl. Phys. 26 (1987) L417.

    Article  Google Scholar 

Download references

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Authors and Affiliations

  1. School of Chemistry, University of Birmingham, P.O. Box 363, B15 2TT, Birmingham, UK

    Frank J. Berry, Colin Greaves & Rupert Lobo

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  1. Frank J. Berry
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  2. Colin Greaves
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  3. Rupert Lobo
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Berry, F.J., Greaves, C. & Lobo, R. Investigations of the lanthanum-europium-copper-oxygen system by X-ray powder diffraction, thermal analysis and europium-151 Mössbauer spectroscopy. Hyperfine Interact 55, 1213–1217 (1990). https://doi.org/10.1007/BF02397151

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