  We propose to exploit currently available tunnel ferromagnetic Josephson
junctions to realize a hybrid superconducting qubit. We show that the
characteristic hysteretic behavior of the ferromagnetic barrier provides an
alternative and intrinsically digital tuning of the qubit frequency by means of
magnetic field pulses. To illustrate functionalities and limitation of the
device, we discuss the coupling to a read-out resonator and the effect of
magnetic fluctuations. The possibility to use the qubit as a noise detector and
its relevance to investigate the subtle interplay of magnetism and
superconductivity is envisaged.
