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On the Influence of Oxygen Deficiency upon EPR Spectra of TmBa2Cu3O7-δ

  • N. Guskos
  • Ch. Trikalinos
  • S. M. Paraskevas
  • A. Koufoudakis
  • C. Mitras
  • H. Gemari-Seale
  • D. Niarchos
  • J. Kuriata
  • L. Sadłowski
  • M. Wabia
  • F. Lembicz
Conference paper

Abstract

It is shown that for the samples with increased oxygen deficiency (non-superconducting tetragonal phase) one observes, apart from the signal due to Cu(+2), another clear signal which may be ascribed to the presence of Tm(+2) ions. For the superconducting sample (TC=91K, orthorhombic phase) this latter signal vanishes and one observes only the signal comming from Cu(+2) ions feeling a crystal field of rhombic symmetry.

PACS numbers

74.70 76.30 

References

  1. 1.
    N. Guskos, M. , S.M. Paraskevas, A. Koufoudakis, C. Mitras, H. Gremari-Seale, J. Kuriata, L. Sadłowski, M. Wabia Phys. Status Solidi (1990) (to be published).Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • N. Guskos
    • 1
  • Ch. Trikalinos
    • 1
  • S. M. Paraskevas
    • 2
  • A. Koufoudakis
    • 3
  • C. Mitras
    • 3
  • H. Gemari-Seale
    • 3
  • D. Niarchos
    • 3
  • J. Kuriata
    • 4
  • L. Sadłowski
    • 4
  • M. Wabia
    • 4
  • F. Lembicz
    • 4
  1. 1.Solid State Section, Department of PhysicsUniversity of AtensAthensGreece
  2. 2.Organic Chemistry, Department of ChemistryUniversity of AthensAthensGreece
  3. 3.Institute of Material ScienceN.C.S.R. “Democritos”Aghia Paraskevi, AthensGreece
  4. 4.Institute of PhysicsTechnical University of SzczecinSzczecinPoland

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