We report a demonstration of the anisotropic Josephson effect in all (103)-oriented junctions consisting of YBa2Cu3O7−δ /PrBa2Cu3O7−δ′/YBa2Cu3O7−δ film sandwiches. The junction shows a resistively shunted junction-like current-voltage characteristics with hysteresis and clear Shapiro steps under the microwave radiation. Depending on the direction of external magnetic field H, the junction exhibits anisotropic Fraunhofer interference patterns with different critical magnetic fields Hc0 and periods in the oscillation of critical current. The agreement between experimental and expected values by the Owen–Scalapino analysis for anisotropic Hc0 confirms that this anisotropic property comes from the anisotropy in the magnetic penetration depth of (103)-oriented YBaCuO films.
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Sato et al. (1994) studied this question.
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