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Experimental results for DC interferometers of asymmetric topology with high-Tc bicrystal Josephson junctions are reported. Model of the tilted bicrystal junctions is discussed. As a model, parallel array of alternating `0'' and `π'' contacts was studied numerically. It has been shown that the array can act as either 0- or π-junction. Both the array characteristics and the critical current dependence on applied magnetic field for the array and DC interferometer are discussed. [Copyright &y& Elsevier]

The π-junction superconducting circuit dynamics was studied by means of numerical simulation technique. Parallel arrays consisting of Josephson junctions of both 0- and π-type were studied as a model of high-Tc grain-boundary Josephson junction. The array dynamics and the critical current dependence on magnetic field are discussed. Experimental results for dc interferometers with 0 and π high-Tc bi-crystal Josephson junctions are reported and discussed in comparison with numerical simulation. [Copyright &y& Elsevier]