Ja. Martindale et Pc. Hammel, OXYGEN NUCLEAR-MAGNETIC-RESONANCE ON THE 90 K PLATEAU OF YBA2CU3O7-DELTA, Philosophical magazine. B. Physics of condensed matter. Statistical mechanics, electronic, optical and magnetic, 74(5), 1996, pp. 573-578
We examine the body of O-17 nuclear magnetic resonance (NMR) data obta
ined in samples of YBa2Cu3O7-delta with T-c greater than or similar to
90 K. We point out significant deviations from typical metallic behav
iour, contrary to conventional characterizations of these data. Furthe
rmore, there is a surprisingly strong sample-to-sample variation in th
e O-17 NMR properties, given the narrow range of oxygen content. We su
ggest that this strong sample variability merits further study.