Preferred Crystal Orientation in Cubic Metals for Josephson Device Electrodes
Original Publication Date: 1978-Mar-01
Included in the Prior Art Database: 2005-Feb-20
One cause for failure of Josephson tunneling devices during thermal cycling is strain-relaxation of the electrodes. Experimental measurement on polycrystalline Pb films containing grains of several orientations indicate that grains of different orientations display different amounts of strain. Furthermore, the measurements indicate that (100) grains are more strained than are grains with other orientations. It should therefore be possible to reduce device failure by fabricating its electrodes from a film with perfect (100) fiber structure or from a single crystal film.