We present experimental studies of static and dynamic properties of 0, pi and 0-pi 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 0-pi Josephson junction is demonstrated by measuring the critical current as a function of two components (B_x, B_y) of an in-plane magnetic field. The experimental observation of a half-integer zero field step in 0-pi SIFS junctions is presented.
@article{arxiv.0801.3229,
title = {Static and dynamic properties of 0, pi, and 0-pi ferromagnetic tunnel Josephson Junctions},
author = {J. Pfeiffer and M. Kemmler and D. Koelle and R. Kleiner and E. Goldobin and M. Weides and A. K. Feofanov and J. Lisenfeld and A. V. Ustinov},
journal= {arXiv preprint arXiv:0801.3229},
year = {2008}
}