On YBaCuO thin films, which were deposited at ambient temperature and were superconducting after post-deposition annealing in oxygen, microbridges and d.c. superconducting quantium interference devices (SQUIDs) were constructed by lift-off. Over a temperature range from 4.2 to > 70 K the devices show well-developed Josephson-like behaviour when irradiated with microwaves. Also, SQUID operation can be observed in this temperature range.
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