| Superconducting quantum interference devices (SQUIDs) are useful for a number of applications such as magnetometers, high speed samplers, and RF amplifiers. In some applications, the advantage of a superconducting system is not sufficient to justify 4.2 K operation. However, a high T;We designed an electron beam evaporator to grow the superconducting thin films in-situ. I discuss the details of this system. I then explain the motivation for and properties of YBCO/MgO/Sapphire bilayers. I detail the fabrication of various SQUIDs and other test structures. The electrical properties were measured. Magnetic field response and noise are compared with standard theories. |
