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Measurements of the electric field gradient at cadmium in the high Tc superconductor YBa2Cu3O6+x

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Abstract

The electric field gradient (EFG) at111Cd probe atoms in YBa2Cu3O6+x has been studied by the perturbed angular correlation (PAC) spectroscopy. After annealing at temperatures below 1000 K the probe atoms are located at the Cu(1) site; above 1100 K they preferentially occupy the Y site, whereas in the intermediate temperature range they also reside on the Ba site. A reduction of the oxygen content from x=1.0 to 0.2 resulted in a decrease of the asymmetry parameter measured at the Ba site, but in an increase of it at the Y site, indicating there a local distortion of the YBa2Cu3O6+x lattice by the Cd impurity. Two different surroundings for the Cd atoms at the Cu(1) site were observed.

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Authors and Affiliations

  1. Physikalisches Institut der Universität Erlangen-Nürnberg, Erwin-Rommel-Str. 1, 8520, Erlangen, FRG

    H. Plank, O. Bauer, D. Forkel, F. Meyer, G. Saemann-Ischenko, J. Ströbel, H. Wolf & W. Witthuhn

  2. Siemens AG, Forschungslabor, 8520, Erlangen, FRG

    B. Roas

Authors
  1. H. Plank
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  2. O. Bauer
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  3. D. Forkel
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  4. F. Meyer
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  5. B. Roas
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  6. G. Saemann-Ischenko
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  7. J. Ströbel
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  8. H. Wolf
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  9. W. Witthuhn
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Plank, H., Bauer, O., Forkel, D. et al. Measurements of the electric field gradient at cadmium in the high Tc superconductor YBa2Cu3O6+x . Hyperfine Interact 61, 1139–1142 (1990). https://doi.org/10.1007/BF02407590

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  • DOI: https://doi.org/10.1007/BF02407590

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