On the Influence of Oxygen Deficiency upon EPR Spectra of TmBa2Cu3O7-δ
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 numbers74.70 76.30
- 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