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Ba nuclear resonance in YBa2Cu2Oy |
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| Authors: | A Yakubowskii A Egorov H Lütgemeier |
| Institution: | 1. Kurchatov Institute of Atomic Energy, Moscow 2. Kazan State University, Kazan 3. KFA Forschungszentrum Jülich, IFF, Germany 4. Institut für Festk?rperforschung, Forschungszentrum Jülich, Postfach 1913, W-5170, Jülich, Germany |
| Abstract: | The first observations of NMR and NQR of both isotopes135Ba and134Ba in isotopically enriched samples of YBa2Cu3Oy with oxygen concentrations y=6.0, 6.2, and 7.0 are described. The pure NQR frequencies and asymmetry parameter are in good agreement with theoretical predictions. The temperature dependence of the NQR frequency of Ba for y=7 is qualitatively similar to that for Cu(2) but much stronger. The temperature dependence of the longitudinal and transverse relaxation times opens new questions. |
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