Previous studies have shown that when hydrogen is added to the superconductor YBa2Cu3O7 (O7), it affects many of its properties, as if chain oxygen were removed. Hence the effect of H on the material should be quite different when these oxygen atoms are missing. We have therefore studied the influence of H on YBa2Cu3O6 (O6). In contrast to the case of O7, the 89Y NMR resonance frequency is independent of x; instead a second line evolves that is shifted to a higher frequency with respect to the original line. The results confirm that hydrogen in O6 qualitatively plays a different role than hydrogen in O7. The quadrupole interaction of 2H in the material yields a coupling constant e2qQ h of about 250 kHz which indicates that the hydrogen forms an O-H bond. X-ray diffraction results are also discussed.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering