  We fabricated high quality $\Nb/\Al_2\O_3/\Ni_{0.6}\Cu_{0.4}/\Nb$
superconductor-insulator-ferromagnet-superconductor Josephson tunnel junctions.
Depending on the thickness of the ferromagnetic $\Ni_{0.6}\Cu_{0.4}$ layer and
on the ambient temperature, the junctions were in the 0 or $\pi$ ground state.
All junctions have homogeneous interfaces showing almost perfect Fraunhofer
patterns. The $\Al_2\O_3$ tunnel barrier allows to achieve rather low damping,
which is desired for many experiments especially in the quantum domain. The
McCumber parameter $\beta_c$ increases exponentially with decreasing
temperature and reaches $\beta_c\approx700$ at $T=2.1 {\rm K}$. The critical
current density in the $\pi$ state was up to $5\:\rm{A/cm^2}$ at $T=2.1 {\rm
K}$, resulting in a Josephson penetration depth $\lambda_J$ as low as
$160\:\rm{\mu m}$. Experimentally determined junction parameters are well
described by theory taking into account spin-flip scattering in the
$\Ni_{0.6}\Cu_{0.4}$ layer and different transparencies of the interfaces.
