NIOBIUM NITRIDE THIN FILMS AND
MULTILAYERS FOR SRF APPLICATIONS
William M. Roach
Advisor: R. Ale Lukaszew
Department of Applied Science
The College of William and Mary
Abstract
Superconducting thin films have the potential to overcome fundamental limitations of bulk
niobium technology that is currently implemented in linear particle accelerators. Before these
thin films can successfully be implemented, systematic studies on structure-property correlations
are necessary. Here, we present the characterization of niobium nitride thin films and
multilayers. We explore the differences between niobium and niobium nitride surfaces.
Additionally, we demonstrate that niobium nitride multilayers are capable of shielding an
underlying niobium film from magnetic fields larger than the lower critical field of bulk niobium.
Roach
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