Jh. Miller et al., USE OF CUPRATE TRICRYSTAL MICROBRIDGES AS PROBES OF SUPERCONDUCTING PAIRING STATE SYMMETRY, Journal of physics and chemistry of solids, 56(12), 1995, pp. 1805-1806
We have carried out field-modulated critical current measurements of n
ominally pure, doped, and ion-irradiation YBCO tricrystal microbridges
in order to probe superconducting pairing state symmetry. Our results
in the short junction limit are consistent with a real combination of
large d-wave and small s-wave components of the order parameter.