Abstract
The relationship of T c to film composition, lattice parameter, ordering, and mechanical deformation in Nb 3 Ge has been investigated. Particular attention has been focused on annealing effects in these films, both those occurring during the deposition as well as post-fabrication effects. We find that inadequate time or temperature of annealing during or after deposition does not allow the maximum possible T c for a given composition to be obtained, while excessive annealing induces the precipitation of second phase Nb 5 Ge 3 with a concomitant decrease in T c . The presence of second phase material accelerates the decrease of T c with annealing. Four-point bending measurements show T c 's of the films deposited on Al 2 O 3 substrates are unchanged up to strains \sim.1% . The breaking strain of these Al5-ceramic composites increases upon addition of a Au layer to the composite.
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