Abstract
We present experimental studies of static and dynamic properties of 0, , and superconductor-insulator-ferromagnet-superconductor (SIFS) Josephson junctions of small and intermediate length. In the underdamped limit, these junctions exhibit a rich dynamical behavior such as resonant steps on the current-voltage characteristics. Varying the experimental conditions, zero-field steps, Fiske steps, and Shapiro steps are observed with a high resolution. A strong signature of the Josephson junction is demonstrated by measuring the critical current as a function of two components ( and ) of an in-plane magnetic field. The experimental observation of a half-integer zero-field step in SIFS junctions is presented.
- Received 18 January 2008
DOI:https://doi.org/10.1103/PhysRevB.77.214506
©2008 American Physical Society